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Give an overview of computer networks, describing some of the different kinds of network

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Introduction

Give an overview of computer networks, describing some of the different kinds of network? This report will focus on the following: � What computer networks are? � The common types of networks they are? � Identifying and describing the different types of networks. � Summing up the topic in conclusion. This technical report will not include the technicality of networks and it will only focuses on the common types of network topologies e.g. star, bus and ring. Computer network is a group of two or more computer systems linked together to share information and hardware. See below image. According to John Wobus (1994), the most common topology of networks includes the bus, star, and token ring topologies. Networks can also be characterised in terms of spatial distance as local area networks (LAN), metropolitan area networks (MAN), and wide area networks (WAN). There are five different types of networks, they are: * Local-area networks (LANs): The computers are geographically close together (that is, in the same building). ...read more.

Middle

Each computer is shown as a sphere, the bus appears as a heavy horizontal line, and connections to the bus appear as vertical lines. The illustration shows a bus network with five computers. Advantages of a Bus Network: � Easy to install - as the cable can be laid along the most effective path � It uses least cable of all topologies, and there is no additional hardware needed � It is in most cases the least expensive solution Disadvantages of a Bus Network: � More expensive cabling - because the line must be shared the cable has to have a high bandwidth. � Not very fast - Addition of nodes negatively affects the performance of the whole network, and if there is a lot of traffic throughput decreases rapidly. Star A star network is a local area network (LAN) in which all computers (workstations or other devices) are directly connected to a common central computer. Every workstation is indirectly connected to every other through the central computer. ...read more.

Conclusion

There are five different types of network, which are Local-area networks (LANs), Wide-area networks (WANs), Campus-area networks (CANs), Metropolitan-area networks (MANs) and Home-area networks (HANs). Network Topologies is also classify types of network. There are 3 main layout of Network Topologies, they are Bus, Star and Ring. In connecting computers together to form a Network, the structure and layout of the computers and the cabling required to link them together must be taking into consideration. The pattern of computer nodes and the way they are interconnected is referred to as the Topology. Reference: Here are the sources we used to find the information we needed. * John Wobus (1994) , Local Area Networks, http://web.syr.edu/~jmwobus/lans/ (accessed 27th November 2003) * No author, Media and Topologies part 1, http://studynotes.net/net1.htm (accessed 5th December 2003) * No author, TekMom's Tech Buzzwords for Students, http://www.tekmom.com/buzzwords/zdnetwork.html (accessed 11th December 2003) * No author, Network, http://www.webopedia.com/TERM/N/network.html (accessed 13th December 2003) * No author, Token Ring, http://homepages.uel.ac.uk/u0110214/TokenRing.htm (accessed 14th December 2003) CI1140 Omar Ahmed Suleiman K0309569 David Adisa K0309548 1 ...read more.

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