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Glossary Task for Networks DUE DATE: 18 February 2005 TASKConstruct a glossary of key terms, with explanations of their meanings, relevant to networks

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Introduction

Year 12 Information Systems By Andrew Cooke A Glossary Task for Networks DUE DATE: 18 February 2005 TASK Construct a glossary of key terms, with explanations of their meanings, relevant to networks. In particular, your explanations should try to put the terms into a meaningful context and, where appropriate, state the strengths and weaknesses of a given feature. For example, under cabling you should state the strengths and weaknesses of the various cabling options and situations where given types of cable would be most appropriate. You should use your own words: do not cut and paste material that you do not understand. A skeleton of terms has been provided below: the list provided is not necessarily exhaustive (there might also be some errors!), and does not replace the material covered in such texts as Navigating IS or Building Information Systems. RESOURCES The items below are only suggestions. You will have no difficulty in finding resources. Websites: www.webopedia.com [You could also search the web using Googol. In all cases, crosscheck what you find against another source.] Books: Barnes, Allan, and Andrew Stewart. Navigating IS: A Textbook for VCE Information Systems. Barnes: Melbourne, 2002. Derfler, Frank, and Les Freed. How the Internet Works. Millennium Edition. Indianapolis, IN: Que, 2000. Fitzpatrick, Michael, et al. Building Information Systems. 2nd Ed. Tuggerah, NSW: Social Science P, 2002. ASSESSMENT Your glossary will be assessed for completeness and accuracy. The mark you achieve will not contribute to the school-assessed component of your final VCE score. Note: the number of dashes, "-", in questions where you are asked to fill-in missing letters, is (or should be!) the number of letters missing; a series of dots, " ... ", indicates that you are expected to write more than a word or two. ------------------------------------------------------------------- ADSL stands for: Asymmetric Digital Subscriber Line It is used on the Internet because it allows more data to be sent over existing telephone lines ------------------------------------------------------------------- Bandwidth: Bandwidth is a measure of how much data can travel and how fast it travels It is measured for digital devices in units of bps and in units of Hzs for analog. ...read more.

Middle

------------------------------------------------------------------- ISDN: stands for Integrated Services Digital Network. It is the international standard for sending voice, video and data over digital telephone lines or normal wires. It can support speeds up to 64 Kbps. ------------------------------------------------------------------- Local Area Network (LAN) A computer network that spans a relatively small area. There are many different types of LANs, the most common for PCs is Ethernet. The following characteristics differentiate one LAN from another: Topology: The geometric arrangement of devices on the network, for example devices can be arranged in a ring or a straight line. protocols: The rules and encoding specifications for sending data. The protocols also determine whether the network uses peer-to-peer or client/ server architecture Media: they use twisted pair wire, coaxial cables, or fibre optic cables. LANs can transmit data at very high rates, much faster than may be achieved over a telephone line; but the distances are short, and the number of devices that can be placed on a given LAN is not great. ------------------------------------------------------------------- Metropolitan Area Network (MAN): Definition: A data network designed for a town or city. MANs differ from LANs or WANs in that: LANs are for computers close together and WANs are for computers that are connected via a telephone line or radio waves. A typical MANs could be used to provide shared access to Businesses and to the public around the town. ------------------------------------------------------------------- Modem: This device is used to transmit data over, telephone or cable lines. ------------------------------------------------------------------- Modes of communication: Simplex: refers to one way communications where one party is the transmitter and the other is the receiver. Half-duplex: refers to two way communications where only one party can transmit at a time. Duplex: refers to the transmission of data in two directions simultaneously. Multiplexor: is a communications device that combines several signals for transmission over a single medium. A demultiplexor is a communications device that completes the process by separating multiplexed signals from a transmission line. ...read more.

Conclusion

What does each abbreviation stand for? b) Provide an example of when each protocol might be used. ------------------------------------------------------------------- Repeaters: Are devices that are used to regenerate or replicate a signal. ------------------------------------------------------------------- Routers: An intelligent device that forwards data packets along networks. A router connects to at least two networks. Routers help in the Internet by sending packets the best way to your computer ------------------------------------------------------------------- Servers: A computer or device on a network that manages network resources. Give a line on each of the following to explain what they do: File Server: is a computer and storage device dedicated to storing files. Print Server: Is a computer that manages one or more printers. Network server: Is a computer that manages network traffic. Database server: Is a computer system that processes database queries Proxy server: sits between a client program and an external server to filter requests. ------------------------------------------------------------------- Switches: A switch is a network device that you plug all the cables together into a device. It is a device capable of creating connections between two or more devices linked to the switch but to each other. It differs from a hub in that a switch leads information directly were as a hub doesn't It differs from a router in that a router knows exactly what it is and it sends it straight away where as a switch wouldn't. It functions to enhance the flow of data in a network by reducing collisions. ------------------------------------------------------------------- TCP: stands for Transmission Control Protocol It is a protocol that enables two hosts to establish a connection and exchange streams of data. ------------------------------------------------------------------- Telnet: A way to control the server and communicate with other servers on the network ------------------------------------------------------------------- URL: Stands for Uniform Resource Locater The first part of the address represents the protocol to use and the second part specifies the IP address or the demain where the resource is located. ------------------------------------------------------------------- Wide Area Network (WAN): Definition: the computers are further apart and are connected by a telephone line or radio waves. The largest WAN in existence is the internet. BY Andrew Cooke ?? ?? ?? ?? 1 of 10 ...read more.

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