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Performance and Fault Management by James M. Thompson, Kent J. Phelps, Robert L. Pavone, Christopher E. Elliott, Paul L. Della Maggiora

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Overview of Frame Relay

Frame Relay is a WAN service optimized for modern data applications. It has higher throughput than X.25, and it makes more efficient use of network resources than individual leased lines running basic HDLC.

Frame Relay more efficiently utilizes bandwidth of a physical link by allowing connectivity to multiple sites through a single physical connection. LAN traffic is bursty by nature, and Frame Relay takes advantage of that burstiness by layering multiple logical connections on a single physical circuit. The individual connections within the physical connection are known as virtual circuits (see Figure 16-1).

Figure 16-1. Typical Frame Relay Network

Frame Relay performance management consists of monitoring the utilization ...

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