What is a data-link connection identifier (DLCI) utilized for?
A) It is used by routers to determine which circuit to forward a frame to in a frame relay network.
B) It is used by routers to establish a packet-switched path to the destination.
C) It is used by ATM switches to determine how to create a switched virtual circuit.
D) It is a locally significant ID used to send connectionless information.

Question

Quizplus · Accepted Answer

DLCI is specifically used in Frame Relay networks to identify a virtual circuit between two devices. Routers use this identifier to forward frames to the correct circuit.

Answer: D 
 DLCI can also be used for connectionless communication, where it is a locally significant identifier used to send information without establishing a virtual circuit.

What Is a Data-Link Connection Identifier (DLCI) Utilized For