In telephony different types of connections are being used. The connection from the phone company’s branch
office to local customers is referred to as which of the following choices?

A.
new loop

B.
local loop

C.
loopback

D.
indigenous loop

Explanation:
In telephony, the local loop is the physical link or circuit that connects from the demarcation point of the
customer premises to the edge of the common carrier or telecommunications service provider’s network.
Incorrect Answers:
A: New loop is not a type of connection.
C: A loopback interface is a serial communications transceiver can use loopback for testing its functionality.
D: Indigenous loop is not a type of connection.

https://en.wikipedia.org/wiki/Local_loop