Which statements are true regarding ISDN channels?（）A、Each B channel can transmit up to 64 kbpsB、The ISDN B channel carries voice or dataC、The ISDN D channel transmits control information.D、The D channel transmission rate varies depending on the service u - 题多多

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题目

Which statements are true regarding ISDN channels?（）

A、Each B channel can transmit up to 64 kbps
B、The ISDN B channel carries voice or data
C、The ISDN D channel transmits control information.
D、The D channel transmission rate varies depending on the service used.
E、HDLC or PPP can be used to encapsulate D channel information.

参考答案和解析

正确答案:A,B,C

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