The company you work for currently has ISDN service in place. Your supervisor wishes to know what sort of ISDN service is being used so that better alternatives can be considered. He tells you that the service has two B-Channels and a D-Channel. What ISDN format do you have?
A) Primary Rate Interface (PRI)
B) Basic Rate Interface (BRI)
C) Basic Rate Extended (BRE)
D) Plain Old Telephone Service (POTS)

Question

Quizplus · Accepted Answer

The given ISDN service has two B-Channels and a D-Channel, which is an indication of Basic Rate Interface (BRI). BRI is a type of ISDN service that offers two B-channels for data and voice transmission and one D-channel for control signaling. Since the question mentions only two B-channels, it cannot be a Primary Rate Interface (PRI) which allows 23 B-channels. The other options, Basic Rate Extended (BRE) and Plain Old Telephone Service (POTS), are not related to ISDN service with B and D channels.

The Company You Work for Currently Has ISDN Service in Place