CCNA 640-802 WAN Practice Questions

CSU/DSU Interface

Home                                                                                   Previous        Next

Q3.  Your router is connect to the service provider through a CSU/DSU. Choose appropriate interfaces used in correct order, starting from the router interface.

                A. 60-pin D-shell connector --> EIA/TIA 232 --> RJ 45

                B. 60-pin D-shell connector --> RJ 45 --> EIA/TIA 232

                C. RJ 45 --> 60-pin D-shell connector --> EIA/TIA 232

                D. EIA/TIA 232 --> RJ 45 --> 60-pin D shell connector

Ans.: A.

Expl.: Traditionally, the router interface on a serial link is a 60-pin D-shell connector. The CSU/DSU may have EIA/TIA 232 interface to the router. The CSU/DSU interface to the service provider could be RJ-11, RJ-45 etc.

Home                                                                                   Previous      Next