Which of the following statements regarding ISDN are correct?()

题目
Which of the following statements regarding ISDN are correct?()

A. Each ISDN B channel has transmission speeds of up to 64 kbps.

B. The ISDN B channel can carry video, voice or data.

C. The ISDN B channel transmission rate varies depending on the service used.

D. The ISDN D channel transmits control information.

E. The ISDN B channels can be configured with different subnets and encapsulation types when dialer profiles are configured.

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