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CCIE Practical Studies: Security (CCIE Self-Study) by Raymond Morrow, Andrew G. Mason, Dmitry Bokotey

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Frame Relay Virtual Circuits

One reason for the continued popularity of Frame Relay is its capability to logically create multiple connection-oriented data link layer communication paths between two devices across a single physical interface. These VC provide a bidirectional communications path that can exist between a single pair of equipment, commonly referred to as a point-to-point connection, or between multiple pairs of equipment, also known as a partial mesh or full mesh. Each of these VCs is identified by a locally unique DLCI. The DLCI value is usually assigned by your service provider.

Frame Relay DLCIs only have local significance to the DTE/DCE pair that it is configured on, which means that their values need only be unique in the ...

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