The main types of network topologies are: Linear Bus Star Ring Tree or Hybridġ7 Linear Bus topology A linear bus topology consists of a main run of cable with a terminator at each end. Transoceanic cables and satellites are used to connect WANsġ6 Topology The physical topology of a network refers to the configuration of cables, computers and other peripherals. Provides long-distance transmission of data, voice, image, and video information over large geographic areasġ5 WAN (Continued) WANs connect larger areas, such as whole states, or even the world. May be wholly owned and operated by a private company, or it may be a service provided by a public company, such as a local telephone company. MAN is designed extended over an entire city. Introduction to Computer Networks Applications of Networks Resource Sharing Hardware (computing resources, disks, printers) Software (application software) Information Sharing Easy accessibility from anywhere (files, databases) Search Capability (WWW) Communication Message broadcast Remote computing Distributed processing (GRID Computing)ġ0 Local Area Network A LAN is a network that is used for communicating among computer devices, usually within an office building or home LAN’s enable the sharing of resources such as files or hardware devices that may be needed by multiple users Is limited in size, typically spanning a few hundred meters, and no more than a mile Is very fast, with speeds from 10 Mbps to 10 Gbps Requires very little wiring, typically a single cable connecting to each device Has lower cost compared to MAN’s or WAN’s i.e cables, telephone lines, radio waves share the same resources such as database, printer Exchange files Exchange electronic message between each othersĦ How are they linked? Computers on a network may be linked through:Ĭables, telephone lines, radio waves, satellites or wireless technologiesħ An example of a network Router Hub Bridge Segment Node Hub Internet Julian Moss, Understanding TCP/IP (first part September 1997)Ĥ What is a network? A network consists of two or more computersĬonnected by network media. 3 Neil Briscoe, Understanding the 7-layer OSI model, July 2000. William Buchana, Mastering the Internet, Ch. The difference between logical and physical addresses What is a protocol in the context of computer networking How protocols are used on remote computers to communicate easily Explain the concept of layering OSI, TCP/IP and hybrid modelsģ Reading Joe Casad, Teach Yourself TCP/IP, Chs 1-2 Chapter 2 INTRODUCTION TO COMPUTER NETWORKSĢ Learning outcomes The difference between networks and internets
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