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Understanding Local Area Networks (LAN): Advantages, Disadvantages, and Topologies

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This comprehensive guide explores Local Area Networks (LAN), detailing their advantages such as cost efficiency, file sharing, and shared internet connections. It addresses key disadvantages, including high setup costs and security vulnerabilities. The document discusses three types of cabled LAN—Twisted Pair, Coaxial Cable, and ITU-T G.hn—along with essential hardware like hubs, routers, and network interface cards. It also covers various LAN topologies including bus, ring, and star structures. Ideal for those seeking a foundational understanding of LAN technology.

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Understanding Local Area Networks (LAN): Advantages, Disadvantages, and Topologies

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  1. LANLocal Area Network By Amal Wali 10DD

  2. Contents • Advantages • Disadvantages • Cabled LAN, 3 types • Essential hardware • LAN topologies • 3 structures of topologies • Bibliography

  3. Advantages • Costly hardware can be shared. • Network software is cheaper than purchasing individual packages. • Same files can accessed by all users. • Messages can be sent between clients. • Single internet connection can be shared by clients. BACK

  4. Disadvantages • Expensive to set up and maintain. • Viruses can spread to all computers in the network. • More prone to hacking due to multiple points of access. • If it is a star network, if the file server goes down, the whole network will go down. BACK

  5. 3 types of Cabled LAN Cabled LAN is not wireless, but requires wires. • Twisted pair: copper wires twisted into pairs. • Coaxial cable: consist of copper or aluminum wire surrounded by an insulating layer. • ITU-T G.hn: uses existing home wiring to create high speed LAN. BACK

  6. Essential hardware for a computer to be connected toLAN • Hub/Switch- interconnected multiple devices to LAN. • Router- distribute shared internet access from WAN to LAN. • NIC (Network Interface Card) • Cabling BACK

  7. LAN topologies LAN topologies is the layout pattern of interconnections of the numerous fundamentals of a computer network. BACK

  8. 3 Structures of Topologies • Bus Topology: use a common backbone to connect all devices. • Ring Topology: has two neighbors for communication purposes. • Star Topology: a central connection point named a “hub node” that may be network hub, switch or router. BACK

  9. Bibliography • http://education.mu/forum/index.php?topic=306.0\ • http://en.wikipedia.org/wiki/Computer_network#Wired_technologies • http://www.facs.org/informatics/krusch.pdf • http://www.google.ae/#hl=en&q=lan+topology&tbs=dfn:1&tbo=u&sa=X&ei=8DaiT66OOs_PiAKJo-SLBw&ved=0CB0QkQ4&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=1592ac683e79e5a4&biw=1280&bih=923 • http://compnetworking.about.com/od/networkdesign/a/topologies.htm BACK

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