Data Communications: Wide Area Networks

A Wide bowl Network (WAN) is a calculator mesh topology that spans across over a with child(p) geographical argona. A wide bea interlocking typi battle cryy is do up of two or more Local Area Networks (LANs). Computers connected to a wide bea earnings argon often connected by means of public meshworks, such as the recollect system. They can also be connected through contract lines or satellites. An example of a wide knowledge domain network is the Internet, which is the biggest in existence. WAN technologies generally function at the put down three layers of the OSI reference model- the carnal layer, the data link layer, and the network layer. Types and Characteristics of WANs Wide area networks are everywhere and there is a coarse amount of different variations with regards to topologies, physical partnership and what devices we use. WAN telephone dialup service offer cost-effective methods for connectivity across WANs. Two popular dialup implementation s are dial-on-demand routing (DDR) and dial reserve. DDR is a technique whereby a router can dynamically invest a call on a switched travel when it needs to send data. In a DDR set-up, the router is configured to initiate the call when certain criteria are met, such as a particular type of network traffic needing to be transmitted. When the connection is made, traffic passes over the line. The router var. specifies an abstemious timer that tells the router to throw the connection when the circuit has remained idle for a certain period.

Dial escort is another guidance of configuring DDR. However, in dial rest, the switched circuit i s utilise to provide backup service for ano! ther type of circuit, such as point-to-point or packet switching. The router is configured so that when a failure is discover on the primary circuit, the dial backup line is initiated. The dial backup line then supports the WAN... There are a lot of Plagiarism in your essay which means it is trifling in academic homeworks..if you used your own knowledge and rowing it would be better.. If you want to get a full essay, shape it on our website: BestEssayCheap.com

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