Titlebook: Mastering Networks; William J. Buchanan Textbook 1999Latest edition Macmillan Publishers Limited 1999 ATM.computer network.Ethernet.Firewa

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Networking Fundamentals,etworks within the organisation. This backbone allows users on different network segments to com-municate and allows data into and out of the local network. Figure 2.1 shows a local area network which contains various segments: LAN A, LAN B, LAN C, LAN D, LAN E and LAN F. These are connected to the

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ISDN,ta tends to create a constant traffic flow whereas computer-type data has bursts of traffic. In addition, sampled data normally needs to be delivered at a given time but computer-type data needs a reliable path where delays are relatively unimportant.

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TCP/IP, node and another on the same network. They do not provide internetworking where data can be transferred from one network to another or from one network segment to another. For data to be transmitted across a network requires an addressing structure which is read by a bridge, gateway and router. The

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TCP/UDP, RFC793 and RFC 1122, ICMP by RFC792 and IP layer by RFC791. TCP provides a connection between two hosts and supports error handling. This chapter discusses TCP in more detail and shows how a connection is established then maintained. An important concept of TCP/IP communications is the usage of por