Multiple choice

Which command must be entered when connecting two routers without external DCE devices via a serial link?

  1. Serial up

  2. Dte rate

  3. Dce rate

  4. Clock rate
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D Correct answer
Explanation

When connecting two routers back-to-back via serial link without an external DCE device (like a CSU/DSU), one router must act as the DCE and provide clocking. The 'clock rate' command must be configured on the router's serial interface designated as the DCE end. Without this clock signal, the serial link cannot synchronize and will not function. The DTE (Data Terminal Equipment) end does not need clock rate configuration.

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