Reliability and Availability Design Issues for LANs
نویسنده
چکیده
In many businesses, LANs have displaced older, paper-based methods of doing work, and these organizations now depend on the reliability and availability of their computer networks for the continuity and efficiency of daily operations. Reliability refers to a LAN's capacity to operate despite failures in communications links and equipment. Availability is a measure of performance; it refers to the LAN's capacity to meet the communications needs of its users. High availability indicates that services are provided immediately; low availability indicates either that users have to wait for network access or that network response is poor. This article discusses some of the technologies that contribute to LAN reliability and availability; by applying these, LAN managers can ensure that their networks serve to enhance productivity in their organizations, not detract from it. Discussions in this article refer to LANs according to their topology. Simple versions of the basic LAN topologies are shown in Exhibit 1.
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