LAN System for Network Dial Up Access

This research considers the feasibility of implementing a LAN system for a hypothetical organization. Additionally, significant problem areas that might be encountered by the organization in such an undertaking, together with suggested solutions, are also considered. Lastly, a commercially available LAN system is recommended for the organization.

Most data communications facilities are provided by common carriers or by valueadded carriers. An alternative to these public utilitytype communications facilities is the local area network, or LAN (Liberman, 1992, pp. 5859).

A LAN is independent of the public utilitytype communications facilities, and typically relies on the use of coaxial cables to connect computers, word processors, terminals, electronic copying machines, and electronic dictation systems within a limited physical area, such as an office building or a manufacturing complex (Data Communications, 1992, pp. 205217).

The major commercial applications of the LAN concept have been developed and are marketed by: (1) Xerox (the "Ethernet" LAN); (2) Novell (the Netware LAN), and (3) IBM (token ring LAN). Each of the commercially marketed LANs differ in some technical aspects; however, each functions in a similar manner.

At one point in the history of scientific thought, it was thought that the universal medium in space was something called luminiferous ether, and it was also thought that this ether was the carri

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ver layer in a LAN, which is composed of memory storage units, printers, and so forth. The Xerox Ethernet LAN is "a baseband, broadcast, multiple access system using carrier sensing and collision detection" (Chorafas, 1989, p. 233). The earlier versions of Ethernet have a capacity of 3.5 Mbps with an advisable throughput of percent, while the more recent versions have a capacity 15 Mbps, with an advisable throughput of 70 percent. The LAN concept provides for the employment of a large number of stations and packet formats, each of which is allocated 48 bits for a worldwide station address that is not duplicated. "Ethernet assures an easy reconfiguration of stations. Equipment can be moved, disconnected from one point, and reattached to another without any need to take down the network. It is, however, good to keep in mind that no LANand Ethernet is no exceptioncan completely guarantee delivery . . . As . . . messages grow . . . , many collide . . . if enough stations try to transmit, less and less data gets through, and the result is continuous collisions (Chorafas, 1989, p. 240). These characteristics apply generally to all commercially marketed LANs. All LANs may be structured in a layered structure, which correspon
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Some common words found in the essay are:
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Approximate Word count = 1603
Approximate Pages = 6 (250 words per page)

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