The ISP needs to terminate the WAN connection. The connection should be located in the network
server room where the company LAN equipment resides. Which of the following identifies the
location?

A.
Smart jack

B.
MDF

C.
VPN

D.
66 block

Explanation:

Short for main distribution frame, a cable rack that interconnects and manages the
telecommunications wiring between itself and any number of IDFs. Unlike an IDF, which connects
internal lines to the MDF, the MDF connects private or public lines coming into a building with the
internal network.