Q
X.25 Protocol can be carried over _________ channels of a Basic Rate Interface (BRI) Line.
AA. B
BB. D
CC. D or h
DD. B or d
Correct Answer:
D. D. B or d
Explanation:
B channel is the Bearer channel where data and voice communication is carried; D is the Delta channel that carries control and signaling information; and H channel is the High-speed communication channel that is formed by combining multiple Bearer channels. Thus B or D channels of BRI line and B channels of PRI (Primary Rate Interface) line are used for carrying X.25.
