WAN Practice Questions

Wide Area Network Interfaces

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Q2. Which of the following is not an interface associated with a WAN connection?

A. V.35

B. EIA 232

C. EIA 530


E. X.21

Correct Answer: D


Typical WAN interfaces, that one come across frequently are:

EIA 232, EIA 449, EIA 530, V.35, and X.21. The Cisco router serial interface will be a 60-pin D-shell connector. This in turn is connected to service provider equipment, usually through a CSU/ DSU. Therefore, appropriate conversion cable need to be used when interfacing with a WAN device such a CSU/DSU. CSU/ DSU in turn is connected to the service provider through the cable supplied by the service provider.

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