CompTIA Network+ N10-006 Q146

Which of the following describes an area containing a rack that is used to connect customer equipment to a service provider?

A. 110 block
B. MDF
C. DSU
D. CSU

Correct Answer: B
Section: Industry standards, practices, and network theory

Explanation:
MDF stands for Main Distribution Frame. A Main Distribution Frame is a commonly a long steel rack accessible from both sides. On one side of the rack is cabling that connects the service provider’s network. The other side of the rack is for the connections to the customer’s equipment.