Wide Area Networks

Q1: When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the clock rate determined?

A By the clock rate command

B By the Physical layer bit stream timing

C Supplied by the CSU/DSU

D By the far end router

ANS:A - Supplied by the CSU/DSU

Clocking on a serial interface is always provided by the CSU/DSU (DCE device). However, if you do not have a CSU/DSU in your nonproduction test environment, then you need to supply clocking with the clock rate command on the serial interface of the router with the DCE cable attached.



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