Comparison Between Lan And Wan Architecture Computer Science Essay

Comparison Between Lan And Wan Architecture Computer Science Essay We have been given this assignment to discuss about the awareness of technologies that are related to the internet and the topic Internet application which we have decided that my topic will be Comparison between LAN and WAN architecture. Using this topic we would have to discuss the current and latest issues that are related to the topic and subject, furthermore discuss the uses of technology and internet applications used in the topic. This topic is about the networks that are used by users across the globe they use these wondrous networks to work, communicate, do business, find information and even play games. Ever since these networks are made people are able to purchase an item or send a massage all by the push of a button. WAN is a network that is more wide in range while LAN is a network that is more limited or has a localized range, both of these networks have their perks and drawbacks and this report is about to discuss all about them including the technologies involved. Objectives Introduce the latest issues of the topic Discuss about the topics advantages and disadvantages Discuss critical comments and analysis What is LAN and WAN Network Architectures WAN A network is a connection between two or more computers that share information, hardware and software with each other this connection can be established via wireless or non-wireless media. LAN and WAN are two different networks that are used by users all around the world. The internet is an example of a WAN network, WAN was first created in 1969 it was first a networking project by ARPANET Pentagons Advance Research Projects Agency the main goal of the project was to allow scientists all around the globe, at different locations to share their information. Only four host nodes at the time and grew to 1000 host nodes in 1984, today there are over 350 million host nodes worldwide using the internet. The internet uses Domain name and IP address to differentiate or identify the computers connected to the internet. WAN is a network that spans over large geographical areas and is consisting of smaller networks called LAN or MAN. WAN is mostly used for business, collecting information, commu nication and other daily uses regardless of the users location. There are many ways to access the internet for example trough Wireless Internet Service Provider, Access provider where some business that provides individuals and other companies and their employees access to the internet with payment or for free. LAN Local area network better known as LAN is a network that has a limited area such as a house, school, computer laboratory, workshop or a small office building. LAN is normally connected through a twisted pair cable, hub or Wi-Fi, LAN is also faster than WAN because of the small area of the network and that the network lack of the need for a leased telecommunication line, in order to share data, printers or a LAN party which means a gathering of users, computers and game consoles for a multiplayer game. In a LAN network there is the main computer called a server and remote computers called clients, a LAN connection can be wireless or wired. Wired LAN network uses cable to connect to all the computers which would like to join the network and the main device called a switch. The wireless however uses radio waves to connect with other clients. Comparison between LAN and WAN Network Architectures There are many differences between LAN and WAN networks, the table displayed below compares the many differences between these two everyday networks. Differences LAN WAN Speed Higher(1000mbps) Lower(150mbps) Owners Owned and controlled by only one user, organization or server Not owned by anyone or any organization Set up costs Set-up costs are low as the devices are low-cost Set-up cost is higher then LAN as the there will be a monthly payment for connection, some connections are free as they are provided by companies Data transfer rate Higher then WAN Lower then LAN Components Use hubs, repeaters, bridges and switches Use router, frame relay switches and multilayer switches Connection Telephone lines and radio waves Often connect trough public networks example telephone lines, leased lines, satellite Maintenance LAN network encounters fewer problems as there are few systems to deal with. Maintenance is easy, faster and cheaper than WAN More errors are encountered in WAN as there are many systems that are at work. Maintenance is harder, slower and tends to be more expensive then LAN Geographical Area LAN covers an area which is within 100meters in length WAN covers a geographical area which is more than 100meters in length Bandwidth High bandwidth then WAN is accessible Low bandwidth is accessible Technical Area of LAN and WAN Network Architectures LAN: How LAN connects LAN has both wired and wireless methods to connect to each other, most LAN networks have a cable running from every computer to a wall jack. The wall jack is connected to a very similar type of cable that runs to a patch panel in a wiring closet. A patch panel is simply cable ports that allow all of the cables coming out of each wall jack to be connected to the LAN freely. Any active wall jack must have the matching port in the patch panel connected to a switch in the wiring closet. A wiring closet is small room or area where all of the wires connect and a building that uses computer networking will have more than one of these wiring closets placed in them, these wiring closets are mainly used for LAN networking. If there are many switches in a wiring closet, they are connected to one or two switches within in the same closet. These serve to connect all of the switches there as well as some of the cable runs entering the room. The switches in a wiring closet are connected to a switch pair in a main wiring closet. The switch pair helps to connect the entire LAN together. These distribution switches connect to the routers that helps the network travel further, connect the switches to the internet or the WAN thus extending the LAN.C:UsersuserDownloadsLANArchitectureDiag1.jpeg LAN Network: Cabling or Wired network Coaxial cable Cable is a medium in where information flows freely from one network device to next and then the next. In a LAN network there are many different types of cables used to connect the devices and computers in it, in the early LAN cabling system LAN used various versions of the coaxial cable. These cables are hard to install and are highly resistant to signal interference. They have a single central solid wire that symmetrically surrounded by a braided or foil conductor. Between the center wire and foil there is the insulation wire and then comes the copper mesh and the outer insulator.C:UsersuserDownloadscoaxla.gif Twisted-pair cable A twisted-pair cable is a cable that is made with an interesting technique, by intertwining the two separate insulated cables together with a certain color code, by doing this process it helps blocking out the electromagnetic interference EMI that could cause problems in the information sent through it. This cable is also the most widely used cable or the most suitable one for LAN networks. There are two different types of twisted pair cable unshielded twisted-pair UTP and shielded twisted-pair STP, the difference is that the STP has a fine wire mesh that surrounds the wire to protect transmissions while the UTP does not, and this is why the UTP is more sensitive than the STP. The STP can also extend to maximum distances and can withstand most environments. This cable was used in IBMs Token Ring in LAN implementation. C:UsersuserDownloadsutp and stp.jpg Fiber Optic cable Fiber optic cable is a the latest version of a LAN cable since the twisted-pair cable, this cable consists of tiny hair like fiber optic glass tubes that transmit the data which is protected by several layers of protective material called Kevlar. These hair like glass tubes transmit information or data with light signals rather than electronic signals, with this design and technology he fiber optic cable eliminates electrical interference, the cable is also known for its immunity to the effects of moisture and lightning which makes it ideal for network connections between buildings. This cable has the ability to transmit signals faster and further then both the coaxial and twisted-pair cable. However there are several disadvantages of the cable, which are the cable is more difficult to install and more costly than both the twisted-pair cable and the coaxial cable.C:UsersuserDownloadsFiber-Cable.jpg LAN Network Topology Network topology is the way they are assembled in which the network of computers and devices connect, each of this topology are used for a specific task and have their own advantages and disadvantages. The computers or users in a network topology are called nodes. Most network topology use a cable as a medium. Bus Topology The bus network topology is the simplest way to connect with multiple nodes, the bus has a single main cable that connects to other nodes, this main cable is also known as the backbone. Each node is connected one right after the other along the backbone, data or information that is sent from a node goes through the backbone until it reaches its receiving node, if an information or data sent such as an email does not reaches the receiving node it will be sent to the terminator which deletes the email completely. The bus is commonly used for implementing Ethernet at 10mbps.C:UsersuserDownloadsbus_topology.gif Advantages Disadvantages Easy to connect to computer or peripheral Backbone breaks entire system shutdown Requires less cable length then star topology Troubleshooting is difficult Ring Topology The ring network is a network topology where each node connects to two other nodes beside it forming a circle or ring and a single continuous link, the nodes are then connected to a main node or the first node. In the network information is passed from one node to the other, which means that a node acts as both the receiver and sender.C:UsersuserDownloadsRING_Topology.png Advantages Disadvantages Easy to wire and install If one node fails entire system fails Troubleshooting is difficult when the entire network fails. Star Topology Star topology is the most common network topology used, unlike the previous topology network the star has a hub or switch in its center, which acts as a conduit that transmits information through the network. Every device in the network is connected to the hub. The hub does not preform filtering or routing type tasks.C:UsersuserDownloadsfigure2.jpg Advantages Disadvantages Easy to modify and add new computers to network without shutting down network Requires more cable then bus and ring topology If one node fails the rest of the network will still function If the hub or switch goes fails the entire network fails Troubleshooting is easy More expensive WAN: NSP NSP also known as network service provider is an organization that does business by selling bandwidth or access to networks such as the internet by providing the backbone access to the internet itself as such the NSP is sometimes referred to or also known as backbone providers or internet providers. WAN network uses NSP to connect to other networks around the world and this is how, by connecting the NSP of other WANs together using links at Internet Packet Interchanges a global communication infrastructure is formed, these interchanges are also called peering points. The NSPs do not generally handle individual customer accounts except for the major corporate customers, but instead deal with intermediate organizations that they can charge for high capacity communications. They generally have an agreement to exchange certain volumes of data at a certain quality of service with other NSPs. So practically any NSP can reach any other NSP, but may require the use of one or more other NSP n etworks to reach the required destination. NSPs vary in terms of the transit delay, transmission rate, and connectivity offered.C:UsersuserDownloadswan.gif WAN: Dial-up access Dial-up internet is a connection which is made by the modem that is built in your computer and through a standard telephones line, by running by running the telephone line to the modem the computer can connect to the internet. This dialing must be done with a specific phone number. The dial-up system is a method that has been the thing of the past as it tends to take a long time to establish a connection with the internet, when it does the internet speed will be very slow. DSL DSL or dial subscribe line is a family of technologies that provide internet access by transmitting data by using the local telephone lines. POTS or better known as Plain Old Telephone Service One, POTS makes the most of the telephone companys wires and equipment is by limiting the frequencies that the switches, telephones and other equipment will carry. Human voices, speaking in normal conversational tones, can be carried in a frequency range of 0 to 3,400 Hertz cycles per second  for a great demonstration of this. This range of frequencies is tiny. These telephone lines are connected by copper wires to each home. Wi-Fi Wi-Fi is a wireless modem that allows a computer to connect to the internet. Wi-Fi can be less secure then the cable connections as bad weather or any other electrical interferences could damage the connection. Wi-Fi has adopted various encryption technologies. The early encryption  WEP, proved easy to break. Higher quality protocols WPA, WPA2 were added later. An optional feature added in 2007, called  Wi-Fi Protected Setup or  WPS, had a serious flaw that allowed an attacker to recover the routers password. Slow speed technology High speed technology Dial-up access uses a modem built in the computer that connects to the telephone line in the house to connect to the internet Cable modem, DSL, WI-FI and satellite modems Connection must be switched on when computer is turned on Connection is always on, when computer is running C:UsersuserDownloadsWAN-network.gif Critical Comments and Analysis This assignment has been a very interesting experience, not only have I learned a lot more regarding aspects of the Internet Applications module but it has also improved my understanding regarding various issues related to Wan and Lan network architectures. Ive come to understand that fundamental difference between them especially in the ways they function, and also in the way to set them up. Lan and Wan are two different networks architectures that are built to serve various users types and will come to play a very fundamental role as the world of information technology develops further. Conclusions The conclusion is, that LAN and WAN is two different networks yet both are just as important, these networks are used every day by everyday people like us. We use them to gather information and communicate with each other. This technology has helped develop our community and will continue developing it.

Shakespeare’s Hamlet: A Conflicted Demonstration

Though Claudia also upset this order by murdering King Hamlet), for Hamlet to even consider killing Claudia, he crosses a moral taboo. Furthermore, when the ghost charges Hamlet to ‘Revenge his foul and most unnatural murder' and Hamlet accepts, replying ‘Haste me to Knott, that I with wings as swift/ As meditation or the thoughts of love/ May sweep to my revenge', he once again disregards the Christian value system that asserts Judgment and punishment to be only the right of God, and not of man.Hamlets only redeeming action, Is that after contemplating ‘To be, or not to be', he does not inevitably commit suicide: a death denied Christian burial. Secondly a sense of right and wrong can be derived from common sense, logic and the conscience. In this regard, Hamlet displays no moral integrity, as he firstly used Aphelia by displaying to her a faked ‘antic disposition' (ACTA, Sac. To which she was ‘so freighted' (ACTA, SSL) before allowing her to believe th at her love had been betrayed when he stated ‘I love you not' to her reply, ‘l was the more deceived' (Act, SSL After this, when given the opportunity to kill Polonium, ‘Now I might do it pat' he refrains because the victim ‘now a is a-praying' and the murder then would send him o heaven'. He shows no mercy, deciding to Walt till later when he is behaving In a way ‘That has no relish of salvation Inner choosing then to trip him that his heels may kick at heaven,] And that his soul may be damned and black,' As hell whereto It goes†¦ (ACTA, IS). It is possible however, that this example of postponing the revenge is an indication that Hamlet was perhaps reluctant, and did not truly wish to kill him. This indication of repressed guilt is also shown in ACTA Scenes where Hamlet states ‘†¦ I am myself indifferent honest, but yet I could accuse me of such things, that it ere better my mother had not borne me. I am very proud, revengeful, ambitio us, with more offences at my beck than I have thoughts to put them in, imagination to give them shape, or time to act them in'.Finally, a Judgment of moral integrity can take place when witnessing Hamlet's response to local laws. In this he varied. By Hamlet deciding to take Claudia' life In exchange for his fathers, he was following the pagan value systems of the era which accepted an ‘eye for an eye'. However, on discovering that Guilelessness and be struck off (ACTA, IS), he stole the commission, and illegally replaced it with a copy harming that Without debasement further, more, or less,] He should those bearers put to sudden death,] Not shriving time allowed'.Despite the action saving his life, Hamlet both broke a law, and ensured the death of those who once were his friends. Therefore, though it appears Hamlet believed he must extract his revenge, and at times showed unwillingness to do so, by this action and the behavior he used to carry it out Hamlet betrayed the relig ious rules, logic, common sense, conscience and law of the Elizabethan era, Hamlet displayed an at best conflicted, and at worst absent moral integrity.

Diversity Essay Samples Mba - the Conspiracy

Diversity Essay Samples Mba - the Conspiracy The Tried and True Method for Diversity Essay Samples Mba in Step by Step Detail The way the topic affected you'll play a huge part in the way you will write your essay. Weave in your perspective to produce your essay unique. Writing an essay is a vital role in academe life. The simplest approach to compose an excellent persuasive essay is to chose a topic you're confident in. Essay writing is normally practiced is schools. Wharton School is situated in Philadelphia, Pennsylvania. Don't be scared to become personal in your MBA essay. There's no ideal solution on the best way to compose an effective essay. Making the completion of private finance coursework a requirement for graduation would make sure that young folks are at least aware of the fundamentals of keeping up a financial stability. Most academic essay topics usually ask you to choose a side in an argument or maybe to defend a specific side against criticism. Valuing also means acknowledgment that there are lots of methods of viewing the world including solving problems and working together in precisely the same atmosphere. The Fundamentals of Diversity Essay Samples Mba Revealed The managing of diversity won't only benefit individuals, teams, the company, but in addition its customers. Please describe your cultural and community service pursuits and why you decided to take part inside t hem. The social networking networks are really good since they enable you to stay in contact with the said family. For taking the benefits of the advantages of diversity at workplace, you must face plenty of challenges. Characteristics of Diversity Essay Samples Mba Diversity, even though it might be an intangible notion or quality, still requires tangible evidence. A diversity statement sample is a helpful bit of document that's utilised to submit an application for a position, mostly for schools and universities. You need to be judicious by means of phrases. Understanding my former responsibilities with regard to theory and learn to turn new theories into practice is a process I cannot wait to start. Therefore, if you're planning to eventually apply to graduate school, bear in mind that you may have to write still another diversity statement! For example a diversity director is going to be involved in all the facets of the company whereby he'll make diversity a general small business requirement. As soon as it's wise to demonstrate some diversity, overusing vocabulary is never encouraged. Even if you're a male, Caucasian, third-generation American, you're still able to illustrate your diversity in different areas. The simplest approach to learn the kind of an essay is to realize the writer's point of view. A persuasive essay has to be able to grab the interest of the folks reading it easily. More to the point, the essays that follow are most likely to supply comfort, that there's no formula or singular approach to craft a thriving answer. If you're terrified of speaking in public, writing a persuasive essay for a specific audience is the best way to remove this fear. Whi ch is the reason why we here offer you some persuasive essay samples that may aid you with your own. The essay does not have any grammatical errors, and a few of the short, punchy phrases reveal a high amount of rhetorical sophistication. Sample persuasive essays can also offer inspiration on topics to write on in addition to serve as examples about how to compose your essay. Your persuasive essay will have a lot of paragraphs. The introductory paragraph is perhaps the most significant paragraph in the essay because it's the initial and possibly last opportunity to generate an effect on the reader. Don't forget that any argumentative essay sample you'll discover on the internet will require a full rewriting in order to prevent plagiarism. The success of the entire essay directly depends upon how good you present the supporting facts. The principal element which produces a persuasive essay in English stand out from the remainder of assignments is the use of reasoning.

Hermes The God of All Communication Essay - 850 Words

Mythology was something that every Grecian incorporated into their everyday life. Myths were told to everyone it was said to be a type of social control. A myth could be described as a common day fable to inspire, teach lessons, and give faith to every Greek that needed something to believe in. Greek mythology became a type of religion to the polytheistic Greeks. They had a god for every aspect of life, love, weather, music, and communication. Greek mythology was â€Å"devoted to the deeds of divinities and heroes in the already constituted world† (Buxton 44). Divinities could be referred to as the Gods and heroes, who were often somewhat mortal. The gods were said to live on Mt. Olympus, which can be referred to as a type of heaven. Mortals†¦show more content†¦In myth is was said that once Hermes learned the path to the underworld he was asked by Hades, lord of the underworld to be his Herald as well, he was to lead departed souls to the underworld and was then name d herald of the dead it was said that â€Å"In this guise he was known as Hermes Psycopompos (soul leader), and he was the only god, besides Persephone and Hades, who could cross into the land of the dead and out again† (Cavendish 670). Hermes was very important in many Greek myths; he would often do the bidding of Zeus. One of his most famous appearances took place in the myth, the odyssey. He actually saved the Greek hero twice throughout the story. In one situation while Odysseus is captured by Cyclopes Hermes convinces him to let Odysseus go, it states â€Å" Zeus made me come; and not my inclination; who cares to cross the tract of desolation; the bitter sea, all mortal towns behind where gods have beef and honors from mankind? But it is not to be thought of –and no use-for any god to elude the will of Zeus,† (Homer Book V, 104). Another time in the story Odysseus has a flashback of when Circe had turned half of his crew into pigs, using the packet of herbs Hermes had provided him he was able to resist being turned into a pig and convinces Circe to free his men. We find ourselves wondering how a Grecian mythical messenger with magical winged sandals could have possibly influencedShow MoreRelatedNo ne of the Women and Goddesses Whom Odysseus Encounters Are a Match for Him888 Words   |  4 Pagesworld, but as dominant and authoritative god like people. They delighted and deceived the men, virtually being the dominant sex of the tale. But was any woman or goddess a match for the lion-hearted Odysseys? In book 5, Odysseus encounters Calypso, Atlas’ daughter, when he is accidentally washed onto the shores of Ogygia. 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Together Olva and Archaeus had 3 mortal children all with incredible strength, guts and wisdom named Copeus, Peito, and Elisha, all of whom lived with him on Mount Olympus. One day, Copeus, the eldest, was walking in a meadow in Missippia, and out of nowhereRead MoreAndrogyny And The Third Gender Essay1813 Words   |  8 Pagesexpression, or communication of gender, which includes masculinity, androgyny, and femininity. Overall, there exist numerous middle grounds across the spectrum of gender theory. In the United States, many people are not aware that this third option is available, since the stereotypical roles of male and female are often the only options prevalent. The concept of androgyny has been around since the time of Greeks, where they had the term â€Å"hermaphrodite† which was the combination of the names Hermes, the god