Understanding the principles and practises of assessment Essay Example for Free

Understanding the principles and practises of assessment Essay 1. Understand the principles and requirements of assessment. 1.1 Explain the functions of assessment in learning and development. An assessment has to be carried out to show that learning is taking place. The initial assessment will show me the learner’s knowledge, skills and capability in the hairdressing industry. The easiest and most effective way to show their understanding is by demonstrating their knowledge and understanding of the criteria that has been given. This can then help me and the learners to see if they have fully understood, and if not is should encourage the learner to ask questions. Sometimes a learner will need guidance to understand what exactly they have to learn, and if they are on track and how they can improve their skills/ techniques. For this to be effective it means that a thorough assessment will need to take place. Formative assessment is where a focus on monitoring the learner’s progress and response to instruction is taken place. This will allow me to observe the learners progress and then give feedback to the learner starting with positive first leading into the more negative feedback where I can then give information derived from the assessment to help improve the next time. Feedback is key and can be given in writing or oral. Learners can also do self assessments to reflect and monitor their progress. summative assessment take place at the end of an unit, this will help me find the right method for obtaining information about what has been learnt, and provides me with information about a students achievement of specific units. This can be done by getting the learner to create a project on a specified aspect of hairdressing e.g. colouring hair. This will then give me an understanding of the individual learner’s performance and understanding of the criteria that needs to be covered. Summative assessment is more formal and can be done through assessments, exams, professional discussion to confirm learn er’s achievement. 1.2 define the key concepts and principles of assessment Assessment is carried out to evaluate that learning has taken place. Assessment used as a progress of making judgements are important, as it helps me to measure where the learner is at, and also measures the attainment of knowledge and skills in the unit that is being assessed. It also helps me to ensure that learners are learning the right criteria.  Learners should know why they are being assessed and what they have to do to meet the assessment criteria. I should not assess the learner unless they are ready to be assessed. The validity of the learners work means that the work that is being produced is relevant to what is being assessed, and it meets the right criteria for the certain level. To ensure reliability of the learner, the work must remain consistent across all learners over a period of time. Evidence is key as it can determine the decision that is being made by me. Ensuring that the learner is doing the work and this it is kept up to date. The anticipated outcome of ass essment is that the learner will complete assessments of city and guild standards within the time frame given, with no assistance and show through answering questions so that they have full understanding of the subject. Evidence should be authentic, the only way I can gather authentic evidence is by observing, so I can witness the learner working. This work has to be produced solely by the learner. Sufficient work is important to ensure the work that is being assessed covers the requirements at that time. Benchmarking can help inform target setting for learners. If targets are not met the learners work will need evaluating so improvements can be implemented. Learners work needs to be current to ensure the learners are producing work that is relevant to the time of assessment. Work can be evaluated to inform current and future practise. Assessment has to remain fair, consistent and valid, to ensure all learners have equal and fair chance of receiving fair assessment. By following the awarding bodys criteria, when all judgements are made about a learner’s performance, it will ensure all assessment is marked to the same criteria to be fair with learners. My own interpretation and understanding of assessment requirements is important. It includes the transparency of making sure everyone who is involved in the assessment process clearly understands what is expected, and can see there is nothing untoward taking place. It is key that I am honest and open with the learners so they do not feel that they have achieved more than they have whilst under assessments. 1.3 explain the responsibilities of the assessor. My main role as an assessor will be to plan and carry out assessment according to the requirements of the qualification and specification of city and guilds. One of my responsibilities is to decide if an assignment having  been completed by the learner has reached the required standard, if it falls short of this then it is my responsibility to assist the learner in the understanding of the subject. To safeguard against standards failing my evaluation is then checked by and I.V, assessing both learner and myself. We both must maintain and improve the assessment process as they will then be assessed by an E.V. During planning my assessments for the learner it needs to be consistent and fair. I need to take into account individual needs of learners. An assessment could be an observation, test or questioning and when devising my own assessment I need to make sure it is at a level of achievements of that learner. There should always be a reason for my assessment, so then I can find out if the learner is ready to progress further. It is important I communicate with the learners so I can inspire and motivate them. I also need to provide feedback to the learners so that they can improve where needed. I should always remain professional and know my boundaries, not getting too friendly. Also I should be fair and ethical towards the learners with no favouritism. While carrying out assessments I need to make a right decision and be fair towards the learners.

The Fall of the Inca Empire Essay -- History, Ecuador, Peru, Chile

The Inca Empire, the massive nation that extended 2,500 miles along the western coast of South America and had a population of over 7 million at its peak. It included all of what is now Ecuador and Peru and most of Chile. Known as â€Å"The Children of the Sun†, they excelled at craftsmanship, weaving, and culture (â€Å"Children of the Sun†). A very religious people, they worshiped the Sun as their supreme god and held religious festivals monthly to appease these gods. Although they did not value it aside from its beautiful appearance, the Inca Empire was home to millions of pounds of solid gold and silver. The Inca had no use for it except to use it to craft decorations and statues. In fact, an Inca citizen valued cloth more than they valued gold or silver. Their collapse would be brought about because of the Spanish invasion, a brutal civil war that weakened the empire, and deadly disease brought over from Europe. The Inca Empire was a combination of many small tribes and nations that the Inca had conquered and placed under their rule. Their government was very well organized and efficient at ruling their subjects. The entire empire, however, was led by an emperor that was recognized by the Inca people as the â€Å"Son of the Sun†. The emperor selected his advisors and appointed governors for all of the territories under Inca control. They also had a very large, highly organized military consisting of around 500 thousand men. The Empire could have lasted centuries, if not for the Spanish invasion. Led by Hernando Pizarro, an accomplished conquistador, the Empire would be brought to its knees in just under thirty five years Before any conquistador had ever step foot in Inca lands, issues that would lead to the Inca’s downfall had been buil... ...ve died and the civil war would not have occurred. Who knows, Huyana Capac may have been a much stronger, brutal leader than Atahualpa and would have killed the Spanish as soon had he heard that they had landed in Peru. Pizarro, being the decisive, military leader that he was, would take advantage of the terrible plague and use it against the Inca. As he traveled from village to village, he would leave a person infected with smallpox in the village so that the whole village would become infected and die. When his men were in Cuzco while it was under siege from Manco Inca, he ordered dead bodies infected with small pox to be thrown into the Inca camps at night. Huge number of Inca soldiers died because of attacks like these. Pizarro and his men were from Europe, so they had some resistance to the diseases they brought with them, so they were not affected by them.

Interrelationship of Intrinsic and Extrinsic Motivation Essay

In the article â€Å"Interrelationship of Intrinsic and Extrinsic Motivation† by Jerry Dermer, there are three different assumptions about the interrelationship between extrinsic and intrinsic motivation from three different researchers. Firstly, Deci, E.L. stated that an extrinsic performance-contingent reward reduces people’s intrinsic motivation. Secondly, Hofstede, G.H. supported that intrinsic motivation is a necessary co-requisite for extrinsic rewards to be motivating; however, intrinsic motivation is not reduced in the occurrence of extrinsic rewards. Thirdly, the general assumption of many motivational researchers believed that intrinsic and extrinsic motivations are unrelated. The purpose of the study was to firstly determine if there is a relationship between extrinsic and intrinsic motivation, and then to help management in resolving the dilemma of whether or not they should provide rewards based on performance. The study conducted a questionnaire which was distributed to 81 department store managers in a large department store chain. The questionnaire included measurements for extrinsic and intrinsic motivation. For extrinsic motivation’s measurement, the questionnaire listed seven statements for managers to rate on the Likert scale. The budget performance in these seven statements was linked to seven extrinsic outcomes: recognition, advancement, job security, better peer relations, better supervisory relations, increased responsibility, and increased salary. For example, â€Å"‘exceeding budgeted performance will lead to more responsibility’† (Dermer, 1975). For intrinsic motivation’s measurement, the questionnaire only listed three statements asking the managers to rate the level to which higher order need satisfaction is affected by good performance. For instance, â€Å"‘Doing my job well gives me a feeling of accomplishment’† (Dermer , 1975). In order to have a fair and accurate result, both statements were presented in Likert format. Managers needed to rank the statements from strongly agree to strongly disagree. Also, the questionnaire was intermixed with other random statements to minimize halo effects and hence increase the accuracy of the result. The result reinforces Hofstede’s statement and overthrows Deci’s and the general assumptions. This research showed that the higher a store manager’s intrinsic motivation, the greater his responsibility, recognition, pay and motivation for advancement. The main finding was that intrinsic motivation was an essential co-requisite for extrinsic motivation. Meanwhile, extrinsic reward would not reduce workers’ intrinsic motivation. The research found out that the higher one’s intrinsic motivation, the greater his motivation for extrinsic rewards. Therefore, based on this concept, management should implement some strategies to stimulate workerâ⠂¬â„¢s intrinsic motivation. During the hiring process, the hiring manager of the organization should inquire about the interviewees’ interests. The main purpose of doing this is to make sure that the interviewee does like the job. The goal of the interview is to hire people who are intrinsically motivated because these individuals are more willing to learn and to accept challenges. Depending on the nature of the organization, the human relations department should carefully select candidates that fit the job requirement, as well as to consider one’s personality. For example, a hospital requires nurses to be extraverted and agreeable. As the employees achieve the person-job fit, which is defined as the workers finding the job that fits their values the most, the employees will have a higher level of intrinsic motivation. For example, when a patient is recovered, the nurse will be proud of herself, hence her intrinsic motivation will increase. Besides, management should work to increase the level of organizational commitment of the workers. The higher the affective commitment, the higher the level of job performance the workers achieve. The reason is that if the workers have high affective commitment, they are more motivated to stay in the organization and is happy to devote their time and energy in benefiting the firm. High affective commitment implies these workers are intrinsically motivated because they love their work. To increase the level of organizational commitment, management should provide a fun workplace and encourage them to think creatively. Moreover, managers should permit workers to have great autonomy and encourage new ideas at the workplace so that workers will be more willing to think about ideas in a greater depth. However, promoting intrinsic motivation may lead to several potential costs. Firstly, a long period of time is needed to foster each worker’s intrinsic motivation. Secondly, the strategies to nurture intrinsic motivation vary from person to person. Even though there are potential costs for promoting intrinsic motivation, the potential benefits resulting from intrinsic motivation are much greater. Firstly, an organization will be more profitable and efficient as its employees are more self-motivated and satisfied with their job. The more self-motivated the employees are, the higher their efficiency. Also, workers will be more motivated and will not need continuous supervision if they like the job. Another benefit from having intrinsically motivated workers is that these workers are less likely to be late as they like their job. Also they are more likely to excel at their jobs. Hence, the organization’s efficiency will be improved significantly. To conclude, the article â€Å"Interrelationship between Intrinsic Motivation and Extrinsic Motivation† by Jerry Dermer is informative in explaining the relationship between two different types of motivation. The reason is that Jerry found three different authoritative researchers and compared their views. Instead of taking away from the research, readers should think about Deci’s and Hofstede’s statement critically because Jerry Derman also talked about the saving grace of Deci’s statement. Lastly, the recommendations for management practices are appropriate as all of the organizations highly demand intrinsically motivated employees. Reference Dermer, J. (1975). The interrelationship of intrinsic and extrinsic motivation. The Academy of Management Journal, 18(1), 125-129. Retrieved from http://www.jstor.org.myaccess.library.utoronto.ca/stable/255630?&Search=yes&searchText=Motivation&list=hide&searchUri=/action/doBasicSearch?filter=jid%3A10.2307%2Fj100040&Query=Motivation&Search.x=0&Search.y=0&wc=on&prevSearch=&item=20&ttl=1206&returnArticleService=showFullText&

Gunnery Sergeant John Basilone Recipient of Medal of Honor

â€Å"There are only two kinds of people who understand Marines: Marines and the enemy. Everyone else just has a second-hand opinion.† (Gen William Thornson, U.S. Army) For decades, the United States Marine Corps has established an identity as a unique and fearless war fighting machine. On November 10th, 1775 the Marine Corps was established in Tun Tavern during the Revolutionary War. Since that time, the Marines have played an important role in securing America’s freedom through countless battles. The Marines have distinguished themselves as an elite force specializing in military tactics which assist in defeating the enemy under any circumstance. The Marine Corps is a small branch with limited personnel which allows them the†¦show more content†¦His war bond tour took him all around the United States. John Basilone wanted to be in the fight instead of touring the country selling war bonds. While being interviewed by reporter James Golden one day he tol d him â€Å"Look Golden, forget my part. There wasn’t a man on the Canal that night who doesn’t own a piece of the medal awarded to me.†(Proser 2004) He ended up requesting to return to the war front but the Marine Corps denied his request. To keep him content the Marine Corps offered Basilone a commission that he respectfully declined. He was also offered an instructor position but he declined that offer as well. The war bond tour lasted from September 1943 until December 1943. In December 1943 Basilone’s request to get back in the fight was finally approved and he was sent to Marine Corps Base Camp Pendleton in California for training. He was in charge of a platoon of new Marine fresh out of boot camp, it was his job to bring them up to speed on being a machine gunner. While he was stationed at Camp Pendleton he met his wife Lena Mae Riggi. She was a Marine Corps reservist who worked in the mess hall. They were married in July of 1944 in Oceanside, Cal ifornia. Iwo Jima remains the Marine Corps’s deadliest campaign. February 19, 1945 was the day of the initial assault on Iwo Jima. That morning nearly eight hundred vessels, ranging from battleships, cruisers, and destroyers to

Kant And Kant s Decision Procedures - 1143 Words

This example deems that killing the one healthy person is morally permissible because it saves five other people, and thus maximizes happiness. However, this judgment severely conflicts with deeply held moral beliefs that it is wrong to kill a healthy person and consequently, this creates a problem for act utilitarians. With regard to Kantianism, Kant believes that moral duty is based on reason. Every rational being must consider the decision procedure for moral reasoning to determine if their action is morally permissible and can be universalized. However, Kant’s decision procedures may lead to conflict. Kant endorses the claim that one must never lie, regardless of the circumstance. As discussed in class, we are tempted to make exceptions to the rule against lying because we think that if we are honest, the consequences will be bad, and if we tell a lie, the consequences will be good. Kant would argue that we can never be certain about what the consequences will be, and for this reason, the best policy is to avoid what we already know is evil – lying. Kant assumes that we would be morally responsible for any bad consequences of lying, but we would not be held accountable for any bad consequences of telling the truth. Consider the following example: Your friend has a baby and asks you if you think that the baby is cute. Your honest opinion is that the baby is ugly. According to Kantianism, you must tell the truth. Kant believes that we would not be responsible for the badShow MoreRelatedThe Ethics Of Non Voluntary Active Euthanasia1050 Words   |  5 Pagesshould be used. When euthanasia is non-voluntary and active, such as on a patient with dementia, the ethical decision comes into play if there are episodes of clarity and the patient has or has not mentioned what they want to do at the end of life situations. Principles of deontology suggest duty and obligation. A medical professional in such situations have an obligation to fulfill the patien t s wishes. The nature of their obligation does not sway based on what they personally think. Patients with dementiaRead MoreCase Analysis : Incident At Morales1234 Words   |  5 PagesMorales presents us with the moral problem confronted at work and home and demonstrates to settle on the right decision ethically. The video is about settling on an ethical decision morally despite the fact that we did our occupation accurately. The video closes tragically because of the choices made by the workers that were made to diminish the expense of the plant. The theories of Kant, Aristotle and Mills as connected to the video alongside tests and instinct are examined in the paper. TitleRead MoreKant s Powerful Reasoning For Moral Atrocities1525 Words   |  7 PagesIsaac Albert Moral Philosophy 3/20/2016 Word Count: 1528 Kant’s powerful reasoning for moral atrocities. 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Mill gave a clear explanation that utilitarian often aim at maximizing utility because it is morally right. All actions that individuals perform in their own initiatives are to make their lives better in the long run. This essay is aimed at explaining the way in which utilitarianismRead MoreConcepts Of The Person : Subjectivity, Identity, And Personhood1836 Words   |  8 PagesPersonhood Professor: Oli Stephano Immanuel Kant, â€Å"The Categorical Imperative† Amy Abdelrazeq and Michael Barzach â€Æ' Class Presentation Response to â€Å"The Categorical Imperative† by Immanuel Kant Immanuel Kant, a German philosopher known as the central figure of modern philosophy, was born on April 22, 1724. Philosophers such as Rene Descartes, David Hume, Aristotle, and Plato influenced Kant. Kant was interested in concepts such as what makes a decision moral vs. immoral, the human mind, and understandingRead MoreThe Ethics Of Physician Assisted Suicide Essay1655 Words   |  7 Pages Should individuals hold the privilege to survive or expire, conferring to their personal perception of a â€Å"good life† even if they are not hurting anyone else? The exceedingly divided dispute around the procedure of physician-assisted suicide (PAS) asks this very question. Although PAS is reasonably fresh to the sphere of moral matters it is often the main topic in many discussions about proper healthcare and palliative care. Physician-assisted suicide was initially permitted in the stateRead MoreDr. Ethos, The Chief Resident Of A Hospital1591 Words   |  7 Pageswell as the good Doctor’s status as the prime transplant surgeon, Dr. Ethos knows that the procedure could go off without a problem. However, the cranky old man would have to die, or rather be killed, in order to successfully treat all the patients. The question is, what would Dr. Ethos do, if he were Utilitarian (Act vs. Rule)? What would Dr. Ethos do, if he were a Deontologist (Kantian)? Utilitarianism John S. Mill describes Utilitarianism, also known as â€Å"The greatest happiness principle†, as a philosophicalRead MorePhilosophy: Deontology vs. Utilinarianism Essay761 Words   |  4 Pageswhether an action is ethical and follows the moral rules, depends on the intentions behind the decisions (Pieper, 2008). So for an action to be â€Å"good† and morally right, it must have been performed at goodwill and abide to moral values. Immanuel Kant was a renowned philosopher known for his theories and his deontological way of thinking. Deontology was also known as kantianism because of him. According to Kant, even though there are times when people don’t want to suffice what is right, they are morally

Should Prostitution Be More Beneficial - 1659 Words

Allie Godat Jessica Perkins Writing 1 November 13, 2015 Prostitution In this essay, I will be giving my arguments on whether or not prostitution would be more beneficial to society and safer it wasn’t illegal. I will be giving you background information on the history of prostitution at the beginning of civilization, and how it came to be illegal in the United States. Next I will state the reasons why prostitution is currently criminalized, and why people think it should remain that way. I will then reply to those arguments while stating my own thoughts and arguments. Lastly, I will provide alternatives to the criminalization of prostitution since there are multiple ways prostitution can become safer without it all being illegal. Within that, I will give examples and evidence from countries today that use some of these alternatives. By definition, a prostitute is a person who has sex with someone in exchange for money. Prostitution is often referred to as â€Å"the oldest profession;† it has been around since the beginning of civiliz ation (Carrasquillo). Some people believe that it even dates back to before mankind; evidence shows that primates have been seen offering sexual services in exchange for food or to avoid an attack. Even during the earliest years of civilization, it was a part of the everyday life of Mesopotamians, Greeks, and the Romans. In Ancient Rome, the sex trade was in high demand because it was needed to control the sexual activities of men so theyShow MoreRelatedPro-Prostitution (The Advantages of Prostitution)1469 Words   |  6 PagesProstitution is the act or practice of engaging in sexual activities in the exchange of money (Dictionary.com). Prostitution is believed by many to be the world?s oldest profession with its roots tracing back to ancient times (Otchet). It is a common belief that prostitutes are only women, but the truth is that prostitutes are predominantly of the female gender. In today?s modern society prostitutes are frowned upon by society because they see it as being on the same category as drug addiction andRead MoreThe introduction of new technological advanced innovations and methods during the Market Revolution1700 Words   |  7 Pagesdeceived and moved from their motherland to work in unfavorable industries with prostitution as the most common jobs for these women. With the incessant growth of the prostitution, the act of participating in promiscuous copulation especially for money, theres an outgoing debate on whether prostitution should be legalized or illegalized. However, people fail to focus on the increasing amount of trafficking and child prostitution aroused by sex tourism. As the world interchanges knowledge, commodities,Read MoreProstitution and Ethical Values Related to It954 Words   |  4 PagesProstitution and Ethical Values related to it Introduction Prostitution can be defined as â€Å"The act or practice of engaging in sexual intercourse for money,† and is usually provided as an underground service. A person who works in this field is called a prostitute, and is a kind of sex worker. Prostitution is one of the branches of the sex industry. The legal status of prostitution varies from country to country, from being permissible but unregulated, to an enforced or unenforced crimeRead MoreShould Prostitution Be Legal?1236 Words   |  5 Pagesmajority of people believe prostitution should stay illegal, claiming that the legalization of prostitution will only make the chances of getting an STD even higher, an increase in rape rates, and will also add to the growth of human trafficking. Although this could be the case, there have been many studies that tell a different story. Currently, Nevada has allowed prostitution in 11 of its counties with much success. There can be many benefits from the legalization of prostitution in the states. LegalizingRead MoreShould Prostitution Be Beneficial For Our Nation?1176 Words   |  5 PagesProstitution is one of the oldest occupations of all t ime. Brothels have always been around since ancient times. So this deviant act is nothing new in the world we live in today. Prostitution shouldn’t be deemed deviant. Prostitution is often said to be the oldest profession, and there is a lot of evidence that this is true. The earliest texts we have reference prostitutes, either sacred ones working for a temple or common street prostitutes. Throughout the Bible, prostitutes played greater or lesserRead MoreProstitution Is Considered The World Oldest Profession1170 Words   |  5 PagesProstitution is regarded as the world’s oldest profession; however, every state, except Nevada, currently prohibits it. According to Dr. Shumsky, â€Å"in the nineteenth-century police departments...confined prostitution to certain locations† to segregate prostitutes from other citizens (Shumsky 668). Many people see prostitution as a fountainhead of vice, and numerous religious leaders have argued that it leads to other crimes such as adultery. One common misconception about prostitution is that mostRead MoreAdvocate Research Paper1248 Words   |  5 Pagesthe U.S. In other countries, however, prostit ution doesn’t carry the same negative connotation, as it does in the U.S. In Canada, The Netherlands, France, and many other countries, prostitution has been legal for some time now. Domestically, the counties surrounding Las Vegas are famous for being home to the only legal commercial fornication in the U.S. Still, to look at Nevada alone when discussing the subject would be to neglect the majority of prostitution that occurs in the US. Illegal sex workRead MoreThe Issue Of Legalizing Prostitution1700 Words   |  7 PagesReleasing laws on prostitution †¦ specifically, legalizing this area of the sex industry, will create a profound impact on society. While halotry (as it was once commonly called) has its detractors and negative connotations, the benefits outway the problems society consistently point out. Society at large questions the merits of legalizing prostitution, when in fact there are several advantages legalization could create. At a minimum, legalizing harlo try will make the job significantly safer and keepRead MoreProstitution Essay1724 Words   |  7 Pages Prostitution has been a part of our worlds culture since the beginning of time, and is the worlds oldest profession. Ever since the beginning of time man has felt the need to pay for services of a sexual nature, whether are legal or not. In our culture; however, prostitution has become a topic of debate concerning the merits of this professions legality. In viewing the legalization of prostitution one must take into account all the pros and cons of the situation, but more importantly what isRead More Prostitution and Functionalism Essay694 Words   |  3 PagesProstitution and Functionalism Works Cited Not Included Throughout America and the entire world, prostitution flourishes. Prostitution is another never ending war like abortion, which society feels is immoral. This immorality leads functionalists, who apply functionalism to this social problem, on a chase to figure out why prostitution is what it is today. Functionalism is the best theory for looking at prostitution. It allows us to see how prostitution changes along with other aspects of

Ethernet as a Network Topology Free Essays

string(69) " switch with many stations \(demand\) and few servers \(resources\)\." Ethernet is the most widely used network topology. You can choose between bus and star topologies, and coaxial, twisted-pair, or fiber optic cabling. But with the right connective equipment, multiple Ethernet-based LANs (local area networks) can be linked together no matter which topology and/or cabling system they use. We will write a custom essay sample on Ethernet as a Network Topology or any similar topic only for you Order Now In fact, with the right equipment and software, even Token Ring, Apple Talk, and wireless LANs can be connected to Ethernet. The access method Ethernet uses is CSMA/CD (Carrier Sense Multiple Access with Collision Detection). In this method, multiple workstation access a transmission medium (Multiple Access) by listening until no signals are detected (Carrier Sense). Then they transmit and check to see if more than one signal is present (Collision Detection). Each station attempts to transmit when it â€Å"believes† the network is free. If there is a collision, each station attempts to retransmit after a preset delay, which is different for each workstation. Collision detection is an essential part of the CSMA/CD access method. Each transmitting workstation needs to be able to detect that simultaneous (and therefore data-corrupting) transmission has taken place. If a collision is detected, a â€Å"jam† signal is propagated to all nodes. Each station that detects the Collision will wait some period of time and then try again. The two possible topologies for Ethernet are bus and star. The bus is the simplest (and the traditional) topology. Standard Ethernet (10BASE5) and Thin Ethernet (1OBASE2), both based on coaxial cable systems, use the bus. Twisted-Pair Ethernet (10BASE-T), based on unshielded twisted pair, and Fiberoptic Ethernet (FOIRL and 10BASE-FL), based on fiberoptic cable, use the star. In the following document we will try to explain what switched, Fast and Gigabit Ethernet are and make comparison of these three. LAN segments can be interconnected using bridges or routers. This works well when the traffic between segments is not high, but the interconnecting devices can become bottlenecks as the inter-segment traffic increases. Until recently, there were few ways to alleviate this problem. Now, however, a new class of interconnect products has emerged that can boost bandwidth on overburdened, traditional LANs while working with conventional cabling and adapters. These are known as LAN switches and are available for Ethernet, token ring, and FDDI. Switching technology is increasing the efficiency and speed of networks. This technology is making current systems more powerful, while at the same time facilitating the migration to faster networks. Understanding this technology is important; only then can we design and implement switched networks from the ground up. Switching directs network traffic in a very efficient manner – it sends information directly from the port of origin to only its destination port. Switching increases network performance, enhances flexibility and eases moves, adds and changes. Switching establishes a direct line of communication between two ports and maintains multiple simultaneous links between various ports. It proficiently manages network traffic by reducing media sharing – traffic is contained to the segment for which it is destined, be it a server, power user or workgroup. It is a cost-effective technique for increasing the overall network throughput and reducing congestion on a 10-Mbps network. Other than the addition of the switching hub, the Ethernet network remains the same the same network interface cards, the same client software, the same LAN cabling. There are three basic types of switches on the market at this time. They all perform the same basic function of dividing a large network into smaller sub-networks, however the manner in which they work internally is different. The types are known as Store and Forward, Cut Through, and Hybrid. A description of each type is shown below: A Store and Forward switch operates much as its name implies; first it stores each incoming frame in a buffer, checks it for errors, and if the frame is good it then forwards it to its destination port. A Cut Through switch operates differently than a Store and Forward type. In a Cut Through switch, the switch begins forwarding the frame immediately upon recieving the Destination Address. A Hybrid switch is an attempt to get the best of both Store and Forward switches and Cut Through switches. A Hybrid switch normally operates in Cut Through mode, but constantly monitors the rate at which invalid or damaged frames are forwarded. Designing A Switched Ethernet Network Designing a switched Ethernet network is actually a fairly straightforward process. The first step is to evaluate the traffic flow through you expect each user or group of users to generate. Analysis of the network will most likely find that you have a large number of users who are not going to place a heavy load on the network, and a smaller number of users who will place a large load on the network. We now group the Undemanding Users together on a hub and connect each hub to a switch port. Our more demanding users will usually be either directly connected to the switch, or if they are on hubs, fewer of them will be sharing each switch port than on the Undemanding User portion. One point which should be kept in mind regarding the design of a switched network is that traffic patterns vary by user and time. Therefore, just taking a â€Å"snapshot† of network usage patterns may lead to the wrong conclusions and result in a design, which is not optimal. It is always advisable to monitor usage patterns over a period of several days to a week to decide how to allocate network bandwidth optimally. Also, in almost all cases, a process of trial and error may be required to fully optimize the design.  · It is most important to get a switch that doesn’t drop frames.  · Latency is a concern, but take it with a grain of salt. It will not make that much of a difference.  · Deciding between cut-through and store-and-forward depends on the application. Time-sensitive applications may need the former.  · Multimedia stations need dedicated switched ports.  · Most switch implementations consist of a switch with many stations (demand) and few servers (resources). You read "Ethernet as a Network Topology" in category "Essay examples" It is best to keep a 1:1 ratio between demand and resource. Or, as mentioned earlier, increase the number of access pipes to the resource. (i.e., multiple lines into one server)  · Baseline your network prior to installing switches to determine the percentage of bad frames that already exist on the network.  · RMON (Remote Monitor) capability embedded in switch ports is may be costly, but it may save time and money in the long run.  · Certain switches support a flow control mechanism known as â€Å"back pressure.† This spoofs collision detection circuitry into thinking there is a collision and subsequently shifting to a back-off algorithm. This throttles back the sending station from transmitting any further data until the back-off process is complete. Switches with this feature need to be placed into the network carefully. What is 100baseT and Why is It Important? 100baseT, also known as Fast Ethernet, is simply a new version of Ethernet that runs at 100 million bits per second, which is ten times the speed of the existing Ethernet standard. 100baseT is becoming very popular because networks need more bandwidth due to more users and to demanding applications like graphics and networked databases. In fact, for many applications, standard Ethernet is simply too slow. For this reason, most experts believe that 100baseT will eclipse Ethernet as the dominant standard for Local Area Networks (LANs) during the next few years. A major advantage of all variants of 100baseT is software compatibility with standard Ethernet. This means that virtually all existing operating systems and application programs can take advantage of 100baseT capabilities without modification. One way fast Ethernet helps network managers make incremental upgrades at relatively low cost is by supporting most wiring and cabling media. The 100-Mbit/s specification can run over the Category 3 and Category 5 wiring already in place. It also runs over fiber optic cabling already installed. Fast Ethernet offers three media options: 100Base-T4 for half-duplex operation on four pairs of Category 3 UTP (unshielded twisted pair) or Category 5 UTP, 100Base-TX for half- or full-duplex operation on two pairs of data-grade Category 5 UTP or STP (shielded twisted pair), and 100Base-FX for half- or full-duplex transmission over fiber optic cable (the specification should be completed by year’s end). As with other high-speed LAN technologies, fast Ethernet operates most efficiently on higher-grade media, such as Category 5 cabling or fiber. For Category 3-based installations, the 100Base-T4 media option uses four pairs of Category 3 UTP cabling. Data is transmitted on three pairs of wires, utilizing standard 8B/6T coding, which allows a lower signal frequency and decreases electromagnetic emissions. However, because the 100Base-T 4 standard uses the three pairs of wires for both transmission and reception, a 100Base-T4 network cannot accommodate full-duplex operation, which requires simultaneous dedication of wire pairs to transmission and reception. Work is still in progress on 100Base-FX fast Ethernet over fiber, but trials show it to be stable and capable of sustained 100-Mbit/s throughput at distances over 100 meters. Essentially, as a second means of transmitting data over fiber, 100Base-FX will be an alternative to FDDI. Moreover, because it will support full-duplex operation, 100Base-FX has the potential to become a significant backbone technology. 100BASE-T Fast Ethernet represents the best choice for customers interested in high speed networking for many reasons. There are 40 million 10 Mbps (Mega-bit per second) Ethernet users in the world today. 100BASE-T technology has evolved from this 10 Mbps world. By keeping the essential characteristics of the Ethernet technology (known as CSMA/CD) unchanged in the 100Mbit world, customers and installers can benefit from the body of Ethernet expertise developed over the years. The Ethernet industry expects that 100BASE-T will offer ten times the performance for twice the price of 10BASE-T. This improvement is made possible by advances in integrated circuit chip technology. As chips get smaller, they run faster, use less energy and are cheaper to produce. Early Ethernet controllers were made in 1.2 micron chips. State-of-the-art technology uses 0.45 micron chips. This represents an almost eight-fold reduction in chip size. 100BASE-T technology offers unparalleled ease of migration. You can decide how fast to upgrade, in what steps and stages, without massive â€Å"fork-lift† upgrades. Most 100BASE-T network cards will run as 10BASE-T and 100BASE-T cards. You will be able to buy cards now and run them at 10BASE-T speeds. Later when you are ready to upgrade to 100BASE-T you will not need to change your network cards. 100BASE-T is widely supported by many different companies. These include networking, systems, semiconductor, computer, integrator and research companies. Many of these companies have been supporting the industry effort through the Fast Ethernet Alliance. Wide support is essential for network users, ensuring a ready supply of interoperable products at competitive prices. The transmission systems of the 100BASE-T standard have high data integrity. It was shown that if 100 million 100BASE-T networks were run at maximum speed it would take over a billion times the age of the universe before there would be an undetected error. These error rates are significantly better than for 10BASE-T, Token Ring and FDDI. Recently, PC LAN adapter card manufacturers like 3Com and SMC have made very aggressive moves to further accelerate the adoption of 100baseT by pricing their 100baseTX products at only a slight premium compared to their standard Ethernet products. For example, a 3Com 100baseTX card is priced at $149, compared to $129 for their Ethernet card. Because virtually all 100baseTX cards also support 10baseT, this means that customers are being encouraged to buy the 100baseT capability even if they don’t need it today. In other words, you can buy the 100baseTX card today and use it on your existing 10baseT network; when you upgrade your network to 100baseTX, you won’t have to throw away your adapter cards. By all accounts, this strategy has been very successful. Gigabit Ethernet is an extension of the highly successful 10Mbps (10Base-T) Ethernet and 100Mbps (100Base-T) Fast Ethernet standards for network connectivity. IEEE has given approval to the Gigabit Ethernet project as the IEEE 802.3z Task Force. Gigabit Ethernet is fully compatible with the huge installed base of Ethernet and Fast Ethernet nodes. The original Ethernet specification was defined by the frame format and support for CSMA/CD (Carrier Sense Multiple Access with Collision Detection) protocol, full duplex, flow control, and management objects as defined by the IEEE 802.3 standard. Gigabit Ethernet will employ all of these specifications. In short, Gigabit Ethernet is the same Ethernet that managers already know and use, but 10 times faster than Fast Ethernet and 100 times faster than Ethernet. It also supports additional features that accommodate today’s bandwidth-hungry applications and match the increasing power of the server and desktop. To support increasing bandwidth needs, Gigabit Ethernet incorporates enhancements that enable fast optical fiber connections at the physical layer of the network. It provides a tenfold increase in MAC (Media Access Control) layer data rates to support video conferencing, complex imaging and other data-intensive applications. Gigabit Ethernet compatibility with Ethernet preserves investments in administrator expertise and support staff training, while taking advantage of user familiarity. There is no need to purchase additional protocol stacks or invest in new middleware. Just as 100Mbps Fast Ethernet provided a low-cost, incremental migration from 10Mbps Ethernet, Gigabit Ethernet will provide the next logical migration to 1000Mbps bandwidth. This section discusses the various topologies in which Gigabit Ethernet may be used. Gigabit Ethernet is essentially a â€Å"campus technology†, that is , for use as a backbone in a campus-wide network. It will be used between routers, switches and hubs. It can also be used to connect servers, server farms (a number of server machines bundled together), and powerful workstations. Essentially, four types of hardware are needed to upgrade an exiting Ethernet/Fast Ethernet network to Gigabit Ethernet :  · Gigabit Ethernet Network Interface Cards (NICs)  · Aggregating switches that connect a number of Fast Ethernet segments to Gigabit Ethernet  · Gigabit Ethernet repeaters ( or Buffered Distributors) The five most likely upgrade scenarios are given below : 1.Upgrading server-switch connections Most networks have centralized file servers and compute servers A server gets requests from a large number of clients. Therefore, it needs more bandwidth. Connecting servers to switches with Gigabit Ethernet will help achieve high speed access to servers. . This is perhaps the simplest way of taking advantage of Gigabit Ethernet. 2.Upgrading switch-switch connections Another simple upgrade involves upgrading links between Fast Ethernet switches to Gigabit Ethernet links between 100/1000 Mbps switches. 3.Upgrading a Fast Ethernet backbone A Fast Ethernet backbone switch aggregates multiple 10/100 Mbps switches. It can be upgraded to a Gigabit Ethernet switch which supports multiple 100/1000 Mbps switches as well as routers and hubs which have Gigabit Ethernet interfaces. Once the backbone has been upgraded, high performance servers can be connected directly to the backbone. This will substantially increase throughput for applications which require high bandwidth. 4.Upgrading High Performance Workstations As workstations get more and more powerful, higher bandwidth network connections are required for the workstations. Current high-end PCs have buses which can pump out more than 1000 Mbps. Gigabit Ethernet can be used to connect such high speed machines. Gigabit Ethernet will be an ideal solution for many of the networking challenges confronting MIS departments today. With businesses implementing more powerful technologies like super-fast servers and data-intensive applications such as video streaming, videoconferencing, or high-speed file backups, the new Gigabit Ethernet standard will go a long way toward adding significant bandwidth at reasonable costs. The following explains some of the key advantages Gigabit Ethernet will provide. Gigabit Ethernet will offer a dramatic increase (as much as a hundredfold) in pure bandwidth to help organizations meet the challenges of overburdened or growing network infrastructures. Gigabit throughput will greatly relieve pressures on LAN backbones while providing both the scalability and speed users need to run data-intensive applications productively. When gigabit data rates become available, firms will be able to greatly expedite large file transfers between servers and other devices. Mirroring the price and performance benefits that Fast Ethernet brought to Ethernet networking, Gigabit Ethernet will offer ten times greater performance than today†s Fast Ethernet at two to three times the cost. The working groups are selecting technologies, such as the Fibre Channel physical layer for fiber, with these specific cost targets in mind. Gigabit Ethernet will maintain the 802.3 and Ethernet standard frame format, as well as 802.3 managed object specifications. As a result, organizations can easily upgrade to gigabit speeds while preserving existing applications; operating systems; protocols such as IP, IPX, and AppleTalk; and network management platforms and tools. Managing Gigabit Ethernet networks upgraded from Fast Ethernet backbones will be simple and easy because the new technology requires no learning curve or training for MIS staffs. By offering backward compatibility with existing 10/100 Ethernet standards, Gigabit Ethernet will provide the same outstanding investment protection that Fast Ethernet offered. When upgrading to gigabit performance, companies will maintain existing wiring, operating systems, protocols, drivers, and desktop applications. No training is required for users or network managers, and network management tools and applications will remain intact. Administrators will be able to keep existing tried-and-tested hardware, software, and management practices while providing-with minimal risk and cost-the networking functionality and performance their organizations require. Gigabit Ethernet is the third generation Ethernet technology offering a speed of 1000 Mbps. It is fully compatible with existing Ethernets, and promises to offer seamless migration to higher speeds. Existing networks will be able to upgrade their performance without having to change existing wiring, protocols or applications. Gigabit Ethernet is expected to give existing high speed technologies such as ATM and FDDI a run for their money. The IEEE is working on a standard for Gigabit Ethernet, which is expected to be out by the beginning of 1998. A standard for using Gigabit Ethernet on twisted pair cable is expected by 1999. How to cite Ethernet as a Network Topology, Essay examples