The Network in 1990s

In this chapter, you lead use up a brief design of computer network. We will introduce some basic companionship and the use of the network to you. Just sit on your chair, we will lead you exploring in the magic world. 1.Uses of reckoner Networks 1)Networks for Companies 2)Networks for People 3)Social Issues 2. brief Introduction of Network 1)Local commonwealth Networks 2)Metropolitan Area Networks 3)Wide Area Networks 4)Internetworks Summary Computer networks rotter be utilize for numerous services, both for companies and for individuals. For companies, networks of personal computers using sh bed servers much provide flexibility and a good price/ instruction execution ratio. For individuals, networks offer access to a variety of information and frolic resources. Roughly speaking, networks can be divided up to LANs, MANs. WANs and internetworks, each(prenominal) with their own characteristics, technologies, speeds and niches. LANs cover a building, MANs cover a city, and WANs cove a country or continent. LANs and MANs are unswitched (i.e. do not have routers); WANs are switched. Networks software consists of protocols, or rules by which process can communicate. Protocols can be either connectionless or connection-oriented.

Most networks oblige protocol hierarchies, with each layer providing services to the layers above it and insulating them from the expound of the Protocols used in lower layers. Protocol stacks are typically based either on the OSI model or the TCP/IP model. Both of these have network, transport, and application layers, still they differ on the other layers. Well-known networks have include Novells NetWare, the APARNET (now defunct), NSFNET, the Internet, and various gigabit testbeds. Networks services have included DQDB, SMDS, X.25, frame relay, and wideband ISDN. All of these are available commercially, from a variety of suppliers. The market place will determine which ones will survive and which ones will not. 1.Uses of Computer Networks... If you want to get a full essay, order it on our website: Orderessay

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