APM236H1 Study Guide - Final Guide: Transmission Control Protocol, Internet Layer

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30 Dec 2011
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Packets from several conversations are multiplexed on trunk lines. Each conversation only pays for the capacity it uses. Bad for voice communication or highly interactive applications. Availability (percentage of time the network is available to users for transmission and reception) Error rate (% lost or damaged messages or bits) Dns provides a way of finding a host"s ip address if only its host name is known. Client host sends dns request xxx. com to dns host, dns host look up the target host"s ip address in a dns table and send back the ip address. Then the client can connect to the target host. Packets are called frames in switched networks. Packets are called packets in routed networks. A packet is carried in a frame within each switched network. The router takes the packet out of the frame. The router puts the packet into a new frame appropriate for the next network and sends it out.

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