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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 Supplied by the CSU/DSU

B By the far end router

C By the clock rate command

D By the Physical layer bit stream timing

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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