The California Education in budget cut Essay Example for Free

The California Education in budget cut Essay Save our children, save our education: The California Education in budget cut Considering that the majority of the population of California is dominated by those who can only afford public school education, it is almost going to be useless for parents to send their children to school. They might think about what they would gain from being at the school. Instead they would just allow their children to work, which is the gravest type of exploitation that a child could experience, being just young. There has been school demonstrations in several districts of California participated in by the teachers, parents and school administrators shouting in anger against the governor. Cutting of the educational budget is fast approaching and realization of this upon enforcement in 2008-2009 shall be the peak at which the protesters and the â€Å"accused† should be a lot more prepared . The proposed budget cut rooted from the governor’s 10% across-the-board cuts to provide venue for state social programs. $4. 8 billion is to be deprived from the secondary education, whereas $1. 3 billion from the higher education will be harvested by him. This will save the governor from the deficit when he declared fiscal emergency to account for the state project shortage of funds, which was actually $16 billion turning $14. 5 dollars (Conway Martinez, 2008). Education is the most important possession parents can leave to their children as a gift. From childhood, every parent is excited on the first day of school that they buy their children’s uniform and prepare for the very first experience of their children to formally hold their pencils and receive their marks, whether excellent or not, they still accept it. What matters is they get the right education and it only depends upon how their children are going to take advantage of the opportunity. The preschool level is just a foretaste, when their children are already at the higher level, which I more crucial, and expensive, that is the time they need to support their children more. They will have to work really hard. Sometimes, when they want their children to get the best education, they send them to an exclusive school because they are confident enough of the training teachers get to be qualified in that school. Preschool and lower school levels are somewhat less in effect, what is usually more important is the college level, wherein students are really shaped as professionals. At some point, whatever type of character the youth will have will basically be under the custody of the biological parents, and of course the secondary ones, the teachers. Academically speaking, this qualifies the children from entering the real world, the better the education gets, the easier it is to go beyond interviews and usually the companies look at the aspect of educational foundation that will serve the professional goals of their company. For Californians, especially the business executives of the top companies, education is ranked as the most important component of their companies in public policy concerns. But then, according to their professional assessment, this can only be achieved when subsequent reforms are done in the educational system. The more competitive is the curriculum in a school and the teachers’ competitiveness on a parallel then what will be achieved is a powerful tool to building up the necessary foundation. They insist that even in high schools this must be already implemented. They claim that this will affect the academic and vocational issues in the future, especially on the race of choosing their future leaders. The government of the United States provides the education of the people from on the federal, state or local levels of provision and control. This makes attending classes really mandatory (till the age of 8) to come up with the most valuable use of time and funds specifically in the primary and secondary level. The school boards are responsible for the monitoring, funding, and setting of policies within their respective districts, which are independent from other local jurisdictions. The catch here is that the education is free for all; it is just an option not to go to public schools and spend big money the private ones. Funding of public education is done by putting on the taxes they are able to get from their districts from the property taxes from each family, side from the funds that the government still subsidizes. Public schools follow the policy set forth by the national government to prevent the inefficient use of the district funds. To maintain the level of academic standards, teachers within them form plans in developing supplementary materials. Education is not mentioned in the constitution of the United States. The government has no control over the schools ran by the district boards. Bush administration initiated the NCLB act or ‘No Child Left Behind Act’ to somehow centralize the educational system. The current Governor of California, Arnold Schwarzenegger is one of the government official patronizing the budget cut, stating that this would cause no harm to the educational system and classrooms of Californian schools. He cut $4 billion from the educational fund, from the country’s 47th in rank in the per-pupil spending. This has significantly negative impact on the educational working force, because doing this drops 57,000 teachers. Other side effects are eliminating 4 weeks of the school year, or increasing the class size by about 23%, making the population in the classroom bigger (Perata, 2008). Ninety-seven percent of the school districts were not able to meet the demands of NCLB. This move of the governor is much of negative impact on him as a political figure because people will think that this is the most illogical thing to do. They believe that cutting the budget will definitely send the remaining three percent to the same situation ang aggravating the performance of the lower majority. How would this affect the future of the children in California? How would this provision affect the learning of the future adult society of America? Shamefully, the truth is obvious to us that it will ruin the educational freedom. Children will suffer from under-education because they will not get the necessary level of knowledge that must be translated to them through proper attention. A classroom blown up in number will be a dilemma; the topics might be taught very slowly in pacing because barriers in effective communication will be magnified, especially when students have a lot to join conversations with, instead of listening to their teacher. Teacher might also lose their teaching capacities because they cannot shoulder themselves the materials needed to effectively deliver their subject matter. Entering school will just become a responsibility, nobody will enjoy it both sides. The young minds which are in fact the easiest to shape shall be blocked with these incapacitating budget cut-off. The ineffectiveness of learning strategies can accumulate and may make the movement of knowledge stagnant, because from the start, they are no longer learning anything. It is very surprising: what we could only think of is that the governor did not really consider the present situation of the struggling population of children hungry for educational support. Its is very alarming that students need to attend extra classes in learning centers just to cope up, with what should have been actually supplied by the school. What should have been implemented about the NCLB policy is no longer met. Isn’t it already a violation of the government policies, and merely the violation of human rights? How possible is it that he claims of the good performance of the students when the current situation is disgusting? Now, how do we think of the future of California having these students under-educated? These children we look at now might find it misty to follow their dreams, to find their positions in the globally competitive industries. What they might have thought of as the only key to save their families from poverty will actually stop them from getting to what they want to reach out for. Their expected growth in terms of spending power shall be hindered because they will not be able to get into the top companies of really good pay, because of the lack of competitiveness. They might be lost and be left behind in the fast changing world, and in exaggerated sense be trapped and die without having to reach what they thought proper education might lead them to. Reference Conway, D. , Martinez, K. (2008). The California budget and the crisis of public education. News and Analysis Retrieved May 21, 2008 Perata, D. (2008). The California Budget Update [Electronic Version]. California Progress Report. Retrieved May 21, 2008, from http://www. californiaprogressreport. com/2008/02/california_educ_1. html

Two Empires In Japan :: English Literature Essays

Two Empires In Japan Two Empires In Japan by John M.L. Young and The Christian Confrontation with Shinto Nationalism by Kun Sam Lee were the two books I used for this topic. The former, an intimate 100 year chronicle of the persecution by the Asian government with their demands that all people bow in Kyujo-yohai, ( worshipping the Imperial House from afar); and the struggle of the Japanese Christians in times of compromise and triumph under such totalitarian pressure. The latter a more detailed historical account of old Shinto and the earliest Christian missionaries. The following essay will focus on the conflicting ideologies within Japan between the Shinto militarists and the Protestant mission effort from it ¹s germination in 1859 until 1957. Dr. Young cites the entrance of Christianity into Japan at 1542 when a ferocious storm found two Portuguese sailors shipwrecked on the southern island of Tanegashima. The Japanese accepted the Romish syncretism of the gospel, but were more interested in the goods and technology that came with later Roman Catholic missionaries who arrived in 1549. The priests ¹ attempts at proselytization were not very difficult; the spirit in which their efforts were received is aptly demonstrated :  ³The images of Buddha, with slight application of the chisel, served as images for Christ. Each Buddhist saint found his counterpart in Roman Christianity; and the road- side shrines of Kannon, the Goddess of Mercy, were rededi- cated to Mary. Temples, altars, bells, holy water vessels, censers, and rosaries were all ready and could be easily adapted to the needs of the new religion. ( Young, pp. 12 ) Oda Noyabunga welcomed the Roman missionaries, for he needed their advanced weaponry to successfully defeat the Ashikaga Shogunate. Shortly after his victory, Noyabunga was assassinated and all priests were driven out of Japan in 1587 vis a vie a decree from Hideyoshi the Great. Sadly, Japan went more than 400 years without the influence of true religion in the entire land. Until the arrival of two Presbyterian missionaries, Dr. and Mrs. J.C. Hepburn in 1859. As the new missionaries became established they began starting mission schools for the children in which could become trained in the way of the gospel. However, after the Meiji Restoration of 1868 ( which consisted of the demotion of 270 Daimyo and over 2 million samurai giving up thier sword and status ), the indigenous religion of Japan, Shintoism, took a revitalized grip on the masses.

Ethical Perspective on Assisted Suicide Essay

Moral and ethical debates attempted to resolves controversial issues but never seem to end with everyone agreeing. Often these ethical and moral debates are complex and involve opinions persuaded by religion or customs and have legal implications to consider. Physician assisted death is one of these very complex and controversial issues that all people will never agree on. Many questions arise in the debate of physician assisted death such as patients’ rights, physicians controlling the right if someone lives or dies, a patience’s mental state, a family member’s rights, religious beliefs of the parties involved and the law. Philosophers attempt to explain the different theories that people will use to argue their belief systems in terms of logic and reasoning. For example, some people may take the position of a deontologist who would argue that it is our moral duty to support and sustain life therefore assisted suicide should not be allowed. Unfortunately, this very emotional thought provoking debate is not a â€Å"black and white issue,† as most ethical arguments are not. In the situation of physician assisted death I disagree with the deontologist point of view that it is immoral for a physician to assist a patient in suicide. I believe as some relativist due, that as long as the patient is fully capable of making this decision and the patient is in a constant state of agony, then the patient has the right to make the choice to live or die. A relativist believes that morals are only relative to that particular society and if physician assisted death was considered moral in that group then it would be considered a moral act. Neither theory is without flaws as some deontologist even share my point of view and some relativist can be very extreme in what they feel is relative to being morally right or wrong. The bottom line is that people will probably never completely agree on this subject. Ethical Perspective on Physician Assisted Death Physician assisted death is also referred to as PAD. Physician assisted death is the more politically and ethical term versus physician assisted suicide. There is also a difference that should be made known between euthanasia and PAD. In a situation of euthanasia the physician administers the lethal does by injection to the patient ending the patient’s life. In physician assisted death the doctor write a prescription for a pill that the patient oluntarily administers themselves that will end their own life. Physician assisted death is now legal in two states, where Organ passed the law in 1994 and Washington state passed the law in 2008. That means in forty eight states it is against the law to assist the patient either directly or indirectly in ending the patient’s life. If a physician even provides information to the patient that would f acilitate their death the doctor can face criminal charges and lose their medical license. Many people are familiar with the radical doctor Dr. Jack Kevorkian who used the method of euthanasia. Dr. Kevorkian is responsible for euthanatizing over 130 people some of which were either clinically depressed or terminally ill. Dr. Kevorkian created a huge debate across the United States that gave rise to many questions such as to the legality of the constitutional laws and ethical perspectives. Laws that are passed don’t not always represent a societies ethical views and vice versus a, some ethical standards are against the law. If everyone had the perspective of relativists, then the laws would vary from city to city. For example, every other city could be for physician assisted death or against it creating a checkered board effect of laws that very from city to city. This because the relativist believes that morals are only relative to what the society believes. Dr. Kevorkian was tried in a Michigan court on four of assisting suicide and was convicted of one count which has videotaped and released to the popular television show â€Å"60 Ethical Perspective on Physician Assisted Death Minutes. † Another doctor by the name of Derek Humphry’s whose wife died a slow agonizing death by cancer started a foundation in his wife’s memory, called the Hemlock Society to provide information to dying patients on how to take the â€Å"final exit. † (Howard Ball 2012) Medical technology has advanced over the years and has allowed us to live healthier and more active life styles. However, with medical advancement came the ability to prolong life and at times keeping patients alive beyond what I feel God has called them to live. At the point in life when a person is being kept alive by a machine breathing for them and intravenous nutrition being given, one has to ask themselves is this â€Å"has medical treatment gone too far by interfering with a natural part of dying. † It seems medical technology has crossed the line at times because it is no longer a matter of improving the quality of life but prolong a natural death. There is a moral dilemma that is taken place where doctors are making billions of dollars by providing long term health care to patients beyond what nature has called for. During the twenty century medical technology advance to point of creating an epidemic where people could live longer lives but it didn’t always guarantee a quality life. Without being able to take care of oneself or enjoy the life they worked hard to create many people feel they don’t want to live a life of suffering. Many people feel they have lost their dignity and don’t want their friends and family to remember them in a feeble state of being. This brings up the question of what is happiness and considered quality of life. I believe the deontologist perspective takes away a human beings right to choose how a person wants to live. A deontologist will argue that life must be sustained because it is our moral duty but isn’t it our moral duty to end a human beings suffering or to let people die a natural Ethical Perspective on Physician Assisted Death death? In fact some deontologists do believe that morals are obligations based on religious beliefs and they don’t support sustaining life in every situation. For example, if a woman was pregnant and the baby was going to cause the death of the mother then they may believe it is acceptable to terminate the pregnancy to sustain the life of the mother. Yet others could argue â€Å"who is to say what is natural,† and when someone should die. Many people who support legalizing patient assisted suicide believe it is the patient’s right to die with dignity but other would insist that society has a moral obligation to preserve life. The relativist would state if the society believes it is moral to condone patient assisted suicide then for the society it is morally correct. â€Å"The view of ethical relativism regards values as determined by one’s own ethical standards, often those provided by one’s own culture and background. Rather than insisting that there are moral absolutes, moral claims must be interpreted in terms of how they reflect a person’s viewpoint; moral claims are then said to be â€Å"right in a given culture† or â€Å"wrong for a given society. (Mosser, K 2010) Those that argue against physician assisted death will argue it is our duty to protect and preserve all life. People will argue their points of views using logic, reasoning and provide supporting evidence. However, in the case of ethical debates there often is not any evidence to support a claim on either side of the issue. Consequently, as much as people will try to argue their point of view with reasoning an d logic their emotions can get in the way and make it difficult to persuade the other person. Many times the family is involved in the case of physician assisted death and each family member may have different ethical beliefs then the patient. This can make the decision even more painful as we taken into consideration the effects our decisions Ethical Perspective on Physician Assisted Death have on other people. Philosophers attempt to explain how people will argue their point of view by providing different ethical theories as with relativism and deontology. The deontologist believes that it is our moral duty to protect and preserve life and that physician assisted suicide is an immoral act. Rather than looking at the consequences of an act, deontology looks at the reason for which an act is done, and the rule according to which one choose to act. Deontology doesn’t deny that acts have consequences; rather, insists that those consequences should not play a role in our moral evaluation of such acts. †(Mosser K 2010) Under the deontology theory a person would claim that it is wrong for a physician to assist a patient in committing suicide because the result is death and we are to preserve life not assisting in taking their life. Deontology and Ethics 2013) This theory would provide that there is no reason good enough to go against ones moral and civic duty even if it means allowing someone to suffer in pain, which ignores the patients’ rights. The terminally ill patient not only wants to live with having their quality of life and having dignity but they also want to die with dignity. The terminally ill patient has few options such as suicide or living in extreme pain. Some patients are too ill to even get out of bed to be able to commit suicide. Terminally ill patients that are suffering should not be made to feel demoralized for wanting to end their suffering. If the patient has paid into a life insurance fund all their life the company mostly likely will not pay their loved ones death benefits if they commit such an act. The problem is patient assisted death is not recognized as a medically necessary procedure. There is also a great stigma that comes along with committing suicide that the families have to live with after their loved one has died. I belief in the individual autonomy Ethical Perspective on Physician Assisted Death Many family members feel disgraced that their loved one acted against their religious beliefs. (Lois Snyder, JD, and Daniel P. Sulmasy 2001) Family members can find themselves in court fighting again other members of their family to keep their loved ones alive. Going to court can be an emotionally painful process and doing so puts the patient through more emotional agony. Many families will break apartment because their ethical views differ so greatly. Roman Catholic Church has been the one biggest contesters of physician assisted death. Ethical arguments are based on beliefs systems that are learned through culture and religion therefore are only relative to that person or society. The One of the issues with relativism is that is a person’s beliefs can be too extreme and farfetched. Under the law of relativism any belief system relevant to that person would be considered ethical even murdering someone. Many doctors and nurses struggle with their feeling on patient assisted death because their morals and ethical views tell them it is wrong to assist a patient in death but they have great sympathy seeing their patients in pain and they want to help. Also, doctors take the Hippocratic Oath which states that doctors will never harm their patients but I argue the facts that prolonging death is harming the patient and takes away their constitutional right to choose death. Many religions believe as deontologist do in that is against their religion to assist someone in procuring their own death but that is exactly it the issue that it their belief system and not everyone’s. The constitutional represents the Liberty Due process clause that says it is a fundamental right for terminally ill patients to die with dignity by the assistance of a medical professional. Lawyers have argued the fourteenth amendment which allows a doctor to remove life support as the last dying will and testament of the patient yet a physician cannot medically assist a patient in ending the life of a terminally ill person who is verbally requesting it. (Howard Ball 2012) Ethical Perspective on Physician Assisted Death Moral and ethical debates spark heated debates and cause controversial issues and never seem to end with everyone agreeing. These ethical and moral debates are complex and involve opinions persuaded by religion or customs nd have legal implications that must be consider. Physician assisted death a very complex and controversial issues that all people will never agree on. There are a lot questions that arise in the debate over physician assisted death such as patients’ rights, physicians controlling the right if someone lives or dies, a patience’s mental state, a family member’s rights, religious beliefs of the parties involved and th e law. It seems that both theories have their flaws. The relativist can be too extreme in their view points because anything can be considered moral if the society feels it is relative. While the deontologist view point is too constrictive and only takes into consideration that a person’s morals are their obligation and a duty to others. The deontologist would ignore the right of the patients even if they were suffering to conform to their obligations and moral duties. I am partial to believing that the patient has a right to choose if they want to live or die under certain circumstances. I believe that morals and ethics are not built on one theory alone but on many parts of theories that consist of logic and reasoning. People will continue to understand the different ethical theories that explain why certain societies believe the way they do. Some people may take the position of a deontologist who would argue that it is our moral duty to support and sustain life therefore assisted suicide should not be allowed. Unfortunately, this very emotional debate has many dynamics, as most ethical arguments do. In the situation of physician assisted death I disagree with the deontologist point of view and feel it is immoral to take away a patients right to end their own suffering. I believe to a certain extent as some relativist believe, that as long as the patient is fully capable of making Ethical Perspective on Physician Assisted Death this decision and the patient is in a constant state of agony, then the patient has the right to make the choice to live or die. The relativist believes that morals are only relative to that particular society and if physician assisted death was considered moral in that group then it would be considered a moral act. Each theory has flaws. Some deontologist share my point of view and some relativist can be very extreme in what they feel is relative to being morally right or wrong. The bottom line is people will probably never completely agree on this subject. As our society evolves and continues to become more liberal in their ethical views on controversial topics such as gay marriage, abortion and personal liberties more states will continue to pass laws support physician assisted death.

Computer Network Data

Sample details Pages: 15 Words: 4422 Downloads: 2 Date added: 2017/06/26 Category Information Systems Essay Type Essay any type Did you like this example? Networking and Management Introduction A computer network is a connection of two or more computers in order to share resources and data. These shared resources can include devices like printers and other resources like electronic mail, internet access, and file sharing. A computer network can also be seen as a collection of Personal computers and other related devices which are connected together, either with cables or wirelessly, so that they can share information and communicate with one another. Don’t waste time! Our writers will create an original "Computer Network Data | Information Systems Dissertations" essay for you Create order Computer networks vary in size. Some networks are needed for areas within a single office, while others are vast or even span the globe. Network management has grown as a career that requires specialized training, and comes with management of important responsibilities, thus creating future opportunities for employment. The resulting expected increase in opportunities should be a determining and persuasive factor for graduates to consider going into network management. Computer networking is a discipline of engineering that involves communication between various computer devices and systems. In computer networking, protocols, routers, routing, and networking across the public internet have specifications that are defined in RFC documents. Computer networking can be seen as a sub-category of computer science, telecommunications, IT and/or computer engineering. Computer networks also depend largely upon the practical and theoretical applications of these engineering and scientifi c disciplines. In the vastly technological environment of today, most organisations have some kind of network that is used every day. It is essential that the day-to-day operations in such a company or organisation are carried out on a network that runs smoothly. Most companies employ a network administrator or manager to oversee this very important aspect of the company’s business. This is a significant position, as it comes with great responsibilities because an organisation will experience significant operational losses if problems arise within its network. Computer networking also involves the setting up of any set of computers or computer devices and enabling them to exchange information and data. Some examples of computer networks include: Local area networks (LANs) that are made up of small networks which are constrained to a relatively small geographic area. Wide area networks (WANs) which are usually bigger than local area networks, and cover a large geographic area. Wireless LANs and WANs (WLAN WWAN). These represent the wireless equivalent of the Local Area Network and Wide Area Networks Networks involve interconnection to allow communication with a variety of different kinds of media, including twisted-pair copper wire cable, coaxial cable, optical fiber, and various wireless technologies. The devices can be separated by a few meters (e.g. via Bluetooth) or nearly unlimited distances (e.g. via the interconnections of the Internet. (https://en.wikipedia.org/wiki/Computer_networking) TASK 1 TCP connection congestion control Every application, whether it is a small or large application, should perform adaptive congestion control because applications that perform congestion control use a network more efficiently and are generally of better performance. Congestion control algorithms prevent the network from entering Congestive Collapse. Congestive Collapse is a situation where, although the network links are being heavily utilized, very little useful work is being done. The network will soon begin to require applications to perform congestion control, and those applications which do not perform congestion control will be harshly penalized by the network, probably in the form of preferentially dropping their packets during times of congestion (https://www.psc.edu/networking/projects/tcpfriendly/) Principles of Congestion Control Informally, congestion entails that too many sources are sending too much data, and sending them too fast for the network to handle. TCP Congestion Control is not the same as flow control, as there are several differences between TCP Congestion Control and flow control. Other principles of congestion control include Global versus point-2-point, and orthogonal issues. Congestion manifests itself by causing loss of packets (buffer overflow at routers), and long delays (queuing in router buffers). Also, during congestion, there is no explicit feedback from network routers, and there is congestion inferred from end-system observed loss. In network-assisted congestion control, routers provide feedback to end systems, and the explicit rate sender sends at –Choke Packet. Below are some other characteristics and principles of congestion control: When CongWin is below Threshold, sender in slow-start phase, window grows exponentially. When CongWin is above Threshold, sender is in congestion-avoidance phase, window grows linearly. When a triple duplicate ACK occurs, Threshold set to CongWin/2 and CongWin set to Threshold. When timeout occurs, Threshold set to CongWin/2 and CongWin is set to 1 MSS. Avoidance of Congestion It is necessary for the TCP sender to use congestion avoidance and slow start algorithms in controlling the amount of outstanding data that is injected into a network. In order to implement these algorithms, two variables are added to the TCP per-connection state. The congestion window (cwnd) is a sender-side limit on the amount of data the sender can transmit into the network before receiving an acknowledgment (ACK), while the receivers advertised window (rwnd) is a receiver-side limit on the amount of outstanding data. The minimum of cwnd and rwnd governs data transmission. (Stevens, W. and Allman, M. 1998) TCP Flow Control In TCP flow control, the receiving side of the TCP connection possesses a receive buffer, and a speed-matching service which matches the send rate to the receiving application’s drain rate. During flow control, Rcvr advertises any spare room by including value of RcvWindow in segments, and the sender limits unACKed data to RcvWindow. TCP flow control also ensures that there is no overflow of the receive buffer. Round-trip Time Estimation and Timeout TCP Round Trip Time and Timeout are usually longer than RTT, but RTT varies, and has a slow reaction to segment loss. SampleRTT is measured time from segment transmission until ACK receipt, ignore retransmissions, and will vary, want estimated RTT â€Å"smoother† Round-trip time samples arrive with new ACKs. The RTT sample is computed as the difference between the current time and a time echo field in the ACK packet. When the first sample is taken, its value is used as the initial value for srtt. Half the first sample is used as the initial value for rttvar. (Round-Trip Time Estimation and RTO Timeout Selection) There are often problems due to timeouts, including the restriction of the sender that is compelled to wait until a timeout, and is able to do nothing during this period. Also, the first segment in the sliding window is often not acked, and retransmission becomes necessary, waiting again one RTT before the segment flow continues. It should be noted that on rece iving the later segments, the receiver sends back ACKs. Estimated RTT EstimatedRTT = 0.875 * EstimatedRTT + 0.125 * SampleRTT DevRTT DevRTT = (1 0.25) * DevRTT + | SampleRTT – EstimatedRTT Timeout interval TimeoutInterval = EstimatedRTT + 4 * DevRTT The integrated services (IntServ) and DiffServ (Differentiated Services) architecture are two architectures that have been proposed for the provision of and guaranteeing of quality of service (QoS) over the internet. Whereas the Intserv framework is developed within the IETF to provide individualized QoS guarantees to individual application sessions, Diffserv is geared towards enabling the handling of different classes of traffic in various ways on the internet. These two architectures represent the IETF’s current standards for provision of QoS guarantees, although neither Intserv nor Diffserv have taken off or found widespread acceptance on the web. (a) Integrated Service Architecture In compute r networking, the integrated services (IntServ) architecture is an architecture that specifies the elements for the guaranteeing of quality of service (QoS) on the network. For instance, IntServ can be used to allow sound and video to be sent over a network to the receiver without getting interrupted. IntServ specifies a fine-grained Quality of service system, in contrast to DiffServs coarse-grained system of control. In the IntServ architecture, the idea is that each router inside a system implements IntServ, and applications which require various types of guarantees have to make individual reservations. Flow Specs are used to describe the purpose of the reservation, and the underlying mechanism that signals it across the network is called RSVP. TSPECs include token bucket algorithm parameters. The idea is that there is a token bucket which slowly fills up with tokens, arriving at a constant rate. Every packet which is sent requires a token, and if there are no tokens, then i t cannot be sent. Thus, the rate at which tokens arrive dictates the average rate of traffic flow, while the depth of the bucket dictates how large the traffic is allowed to be. TSPECs typically just specify the token rate and the bucket depth. For example, a video with a refresh rate of 75 frames per second, with each frame taking 10 packets, might specify a token rate of 750Hz, and a bucket depth of only 10. The bucket depth would be sufficient to accommodate the burst associated with sending an entire frame all at once. On the other hand, a conversation would need a lower token rate, but a much higher bucket depth. This is because there are often pauses in conversations, so they can make do with fewer tokens by not sending the gaps between words and sentences. However, this means the bucket depth needs to be increased to compensate for the traffic being larger. (https://en.wikipedia.org/wiki/Integrated_services) (b) Differentiated Service Architecture The RFC 2475 (An Architecture for Differentiated Services) was published In 1998, by the IETF. Presently, DiffServ has widely replaced other Layer 3 Quality of Service mechanisms (such as IntServ), as the basic protocol that routers use to provide different service levels. DiffServ (Differentiated Services) architecture is a computer networking architecture which specifies a scalable, less complex, coarse-grained mechanism for the classification, management of network traffic and for provision of QoS (Quality of Service) guarantees on modern IP networks. For instance, DiffServ can be used for providing low-latency, guaranteed service (GS) to video, voice or other critical network traffic, while ensuring simple best-effort traffic guarantees to non-critical network services like file transfers and web traffic. Most of the proposed Quality of Service mechanisms which allowed these services to co-exist were complicated and did not adequately meet the demands Internet users because modern data ne tworks carry various kinds of services like streaming music, video, voice, email and also web pages. It would probably be difficult to implement Intserv in the core of the internet because most of the communication between computers connected to the Internet is based on a client/server structural design. This Client/server describes a structure involving the connection of one computer to another for the purpose of giving work instructions or asking it questions. In an arrangement like this, the particular computer that questions and gives out instructions is the client, while the computer that provides answers to the asked questions and responds to the work instructions is the server. The same terms are used to describe the software programs that facilitate the asking and answering. A client application, for instance, presents an on-screen interface for the user to work with at the client computer; the server application welcomes the client and knows how to respond correctly t o the clients commands. Any file server or PC can be adapted for use as an Internet server, however a dedicated computer should be chosen. Anyone with a computer and modem can join this network by using a standard phone. Dedicating the server that is, using a computer as a server only helps avoid some security and basic problems that result from sharing the functions of the server. To gain access to the Internet you will require an engineer to install the broadband modem. Then you will be able to use the server to network the Internet on all machines on a network. (www.redbooks.ibm.com/redbooks/pdfs/sg246380.pdf) TASK 5 Network security These days, computers are used for everything from shopping and communication to banking and investment. Intruders into a network system (or hackers) do not care about the privacy or identity of network users. Their aim is to gain control of computers on the network so that they can use these systems to launch attacks on other computer systems. Therefore people who use the network for these purposes must be protected from unknown strangers who try to read their sensitive documents, or use their computer to attack other systems, and send forged email, or access their personal information (such as their bank or other financial statements) Security Clauses The International Organisation for Standardizations (ISOs) 17799: 2005 Standard is a code of practice for information security management which provides a broad, non-technical framework for establishing efficient IT controls. The ISO 17799 Standard consists of 11 clauses that are divided into one or more security categories for a total of 39 security categories The security clauses of the ISO standard 17799:2005- code of practice for Information Security Management include: The security Policy clause Organizing Information Security Asset Management. Human Resources Security. Physical and Environmental Security. Communications and Operations. Access Control. Information Systems Acquisition, Development, and Maintenance. Information Security Incident Management. Business Continuity Management. Compliance. (https://www.theiia.org/ITAuditArchive/index.cfm?act=ITAudit.printiiid=467aid=2209) Here is a brief description of the more recent version of these security clauses: Security Policy: Security policies are the foundation of the security framework and provide direction and information on the companys security posture. This clause states that support for information security should be done in accordance with the companys security policy. Organizing Information Security: This clause addresses the establishment and organizational structure of the security program, including the appropriate management framework for security policy, how information assets should be secured from third parties, and how information security is maintained when processing is outsourced. Asset Management: This clause describes best practices for classifying and protecting assets, including data, software, hardware, and utilities. The clause also provides information on how to classify data, how data should be handled, and how to protect data assets adequately. Human Resources Secur ity: This clause describes best practices for personnel management, including hiring practices, termination procedures, employee training on security controls, dissemination of security policies, and use of incident response procedures. Physical and Environmental Security: As the name implies, this clause addresses the different physical and environmental aspects of security, including best practices organizations can use to mitigate service interruptions, prevent unauthorized physical access, or minimize theft of corporate resources. Communications and Operations: This clause discusses the requirements pertaining to the management and operation of systems and electronic information. Examples of controls to audit in this area include system planning, network management, and e-mail and e-commerce security. Access Control: This security clause describes how access to corporate assets should be managed, including access to digital and nondigital information, as well as network resources. Information Systems Acquisitions, Development, and Maintenance: This section discusses the development of IT systems, including applications created by third-parties, and how security should be incorporated during the development phase. Information Security Incident Management: This clause identifies best practices for communicating information security issues and weaknesses, such as reporting and escalation procedures. Once established, auditors can review existing controls to determine if the company has adequate procedures in place to handle security incidents. Business Continuity Management: The 10th security clause provides information on disaster recovery and business continuity planning. Actions auditors should review include how plans are developed, maintained, tested, and validated, and whether or not the plans address critical business operation components. Compliance: The final clause provides valuable information auditors can use when identifying the compliance level of systems and controls with internal security policies, industry-specific regulations, and government legislation. (Edmead, M. T. 2006 retrieved from https://www.theiia.org/ITAuditArchive/?aid=2209iid=467) The standard, which was updated in June 2005 to reflect changes in the field of information security, provides a high-level view of information security from different angles and a comprehensive set of information security best practices. More specifically, ISO 17799 is designed for companies that wish to develop effective information security management practices and enhance their IT security efforts. Control Objectives The ISO 17799 Standard contains 11 clauses which are split into security categories, with each category having a clear control objective. There are a total of 39 security categories in the standard. The control objectives in the clauses are designed to meet the risk assessment requirements and they can serve as a practical guideline or common basis for development of effective security management practices and organisational security standards. Therefore, if a company is compliant with the ISO/IEC 17799 Standard, it will most likely meet IT management requirements found in other laws and regulations. However, because different standards strive for different overall objectives, auditors should point out that compliance with 17799 alone will not meet all of the requirements needed for compliance with other laws and regulations. Establishing an ISO/IEC 17799 compliance program could enhance a companys information security controls and IT environment greatly. Conducting an audit evaluation of the standard provides organizations with a quick snapshot of the security infrastructure. Based on this snapshot, senior managers can obtain a high-level view of how well information security is being implemented across the IT environment. In fact, the evaluation can highlight gaps present in security controls and identify areas for improvement. In addition, organizations looking to enhance their IT and security controls could keep in mind other ISO standards, especially current and future standards from the 27000 series, which the ISO has set aside for guidance on security best practices. (Edmead, M. T. 2006 retrieved from https://www.theiia.org/ITAuditArchive/?aid=2209iid=467) Tree Topology Tree topologies bind multiple star topologies together onto a bus. In its most simple form, only hub devices are directly connected to the tree bus and the hubs function as the root of the device tree. This bus/star hybrid approach supports future expandability of the network much better than a bus (limited in the number of devices due to the broadcast traffic it generates) or a star (limited by the number of hub ports) alone. Topologies remain an important part of network design theory. It is very simple to build a home or small business network without understanding the difference between a bus design and a star design, but understanding the concepts behind these gives you a deeper understanding of important elements like hubs, broadcasts, ports, and routes. (www.redbooks.ibm.com/redbooks/pdfs/sg246380.pdf) Use of the ring topology should be considered for use in medium sized companies, and the ring topology would also be the best topology for small companies because it is ensures ease of data transfer. Ring Topology In a ring network, there are two neighbors for each device, so as to enable communication. Messages are passed in the same direction, through a ring which is effectively either counterclockwise or clockwise. If any cable or device fails, this will break the loop and could disable the entire network. Bus Topology Bus networks utilize a common backbone to connect various devices. This backbone, which is a single cable, functions as a shared medium of communication which the devices tap into or attach to, with an interface connector. A device wanting to communicate with another device on the network sends a broadcast message onto the wire that all other devices see, but only the intended recipient actually accepts and processes the message. (www.redbooks.ibm.com/redbooks/pdfs/sg246380.pdf) Star Topology The star topology is used in a lot of home networks. A star network consists of a central connection point or hub that can be in the form of an actual hub, or a switch. Usually, devices will connect to the switch or hub by an Unshielded Twisted Pair (UTP) Ethernet. Compared to the bus topology, a star network generally requires more cable, but a failure in any star network cable will only take down one computers network access and not the entire LAN. If the hub fails, however, the entire network also fails. (www.redbooks.ibm.com/redbooks/pdfs/sg246380.pdf) Relating the security clauses and control objectives to an organisation In an organisation like the Nurht’s Institute of Information Technology (NIIT), the above mentioned security clauses and control objectives provide a high-level view of information security from different angles and a comprehensive set of information best security practices. Also, the ISO 17799 is designed for companies like NIIT, which aim to enhance their IT security, and to develop effective information security management practices. At NIIT, the local network relies to a considerable degree, on the correct implementation of these security practices and other algorithms so as to avoid congestion collapse, and preserve network stability. An attacker or hacker on the network can cause TCP endpoints to react in a more aggressive way in the face of congestion, by the forging of excessive data acknowledgments, or excess duplicate acknowledgments. Such an attack could possibly cause a portion of the network to go into congestion collapse. The Security Policy clause states that â€Å"support for information security should be done in accordance with the companys security policy.† (Edmead, M. T. 2006). This provides a foundation of the security framework at NIIT, and also provides information and direction on the organisation’s security posture. For instance, this clause helps the company auditors to determine whether the security policy of the company is properly maintained, and also if indeed it is to be disseminated to every employee. The Organizing Information Security clause stipulates that there should be appropriate management framework for the organisation’s security policy. This takes care of the organizational structure of NIIT’s security program, including the right security policy management framework, the securing of information assets from third parties, and the maintenance of information security during outsourced processing. At NIIT, the Security clauses and control objectives define the companyâ€℠¢s stand on security and also help to identify the vital areas considered when implementing IT controls. The ISO/IEC 17799s 11 security clauses enable NIIT to accomplish its security objectives by providing a comprehensive set of information security best practices for the company to utilize for enhancement of its IT infrastructure. Conclusion Different businesses require different computer networks, because the type of network utilized in an organisation must be suitable for the organisation. It is advisable for smaller businesses to use the LAN type of network because it is more reliable. The WAN and MAN would be ideal for larger companies, but if an organisation decides to expand, they can then change the type of network they have in use. If an organisation decides to go international, then a Wireless Area Network can be very useful Also, small companies should endeavor to set up their network by using a client/server approach. This would help the company to be more secure and enable them to keep in touch with the activities of others are doing. The client/server would be much better than a peer-to-peer network, it would be more cost-effective. On the average, most organisations have to spend a good amount of money and resources to procure and maintain a reliable and successful network that will be and easy to m aintain in the long run. For TCP Congestion Control, when CongWin is below Threshold, sender in slow-start phase, window grows exponentially. If CongWin is above Threshold, sender is in congestion-avoidance phase, window grows linearly. When a triple duplicate ACK occurs, Threshold set to CongWin/2 and CongWin set to Threshold, and threshold set to CongWin/2 and CongWin is set to 1 MSS when a timeout occurs. For a Small Office/Home Office (SOHO), networks such as wireless networks are very suitable. In such a network, there won’t be any need to run wires through walls and under carpets for connectivity. The SOHO user need not worry about plugging their laptop into docking stations every time they come into the office or fumble for clumsy and unattractive network cabling. Wireless networking provides connectivity without the hassle and cost of wiring and expensive docking stations. Also, as the business or home office grows or shrinks, the need for wiring new computer s to the network is nonexistent. If the business moves, the network is ready for use as soon as the computers are moved. For the wired impossible networks such as those that might be found in warehouses, wireless will always be the only attractive alternative. As wireless speeds increase, these users have only brighter days in their future. (https://www.nextstep.ir/network.shtml) It is essential to note that the computer network installed in an organisation represents more than just a simple change in the method by which employees communicate. The impact of a particular computer network may dramatically affect the way employees in an organisation work and also affect the way they think. Bibliography Business Editors High-Tech Writers. (2003, July 22). International VoIP Council Launches Fax-Over-IP Working Group. Business Wire. Retrieved July 28, 2003 from ProQuest database. Career Directions (2001 October). Tech Directions, 61(3), 28 Retrieved July 21, 2003 from EBSCOhost database Edmead, M. T. (2006) Are You Familiar with the Most Recent ISO/IEC 17799 Changes? (Retrieved from https://www.theiia.org/ITAuditArchive/?aid=2209iid=467) FitzGerald, J. (1999), Business Data Communications And Networking Pub: John Wiley Sons Forouzan, B. (1998), Introduction To Data Communications And Networking Pub: Mc- Graw Hill https://www.theiia.org/itaudit https://www.theiia.org/ITAuditArchive/index.cfm?act=ITAudit.printiiid=467aid=2209 https://www.psc.edu/networking/projects/tcpfriendly/ ISO/IEC 17799:2000 – Code of practice for information security management Published by ISO and the British Standards Institute [https://www.iso.org/] I SO/IEC 17799:2005, Information technology – Security techniques – Code of practice for information security management. Published by ISO [https://www.iso.org/iso/en/prods-services/popstds/informationsecurity.html] Kurose, J. F. Ross, K. W. 2002. Computer Networking A Top-Down Approach Featuring the Internet, 2nd Edition, ISBN: 0-321-17644-8 (the international edition), ISBN: 0-201-97699-4, published by Addison-Wesley, 2002 www.awl.com/cs Ming, D. R. Sudama (1992) NETWORK MONITORING EXPLAINED: DESIGN AND APPLICATION Pub: Ellis Horwood Rigney, S. (1995) NETWORK PLANNING AND MANAGMENT YOUR PERSONAL CONSALTANT Round-Trip Time Estimation and RTO Timeout Selection (retrieved from https://netlab.cse.yzu.edu.tw/ns2/html/doc/node368.html) Shafer, M. (2001, June 11). Careers not so secure? Network Computing, 12(12), 130- Retrieved July 22, 2003 from EBSCOhost database Stevens, W. and Allman, M. (1998) TCP Implementation Working Group (retrieved from https://www.ietf.org/proceedings/98aug/I-D/draft-ietf-tcpimpl-cong-control-00.txt) Watson, S (2002). The Network Troubleshooters. Computerworld 36(38), 54. (Retrieved July 21, 2003 from EBSCOhost database) Wesley, A. (2000), Internet Users Guide to Network Resource Tools 1st Ed, Pub: Netskils www.microsoft.co.uk www.apple.com www.apple.co.uk www.bized.com https://www.nextstep.ir/network.shtml www.novell.com www.apple.com/business www.microsoft.com/networking/e-mails www.engin.umich.edu www.microsoft.com