Identify 3 characteristics of ISDN?
A.) Transports voice and data
B.) Transports voice only
C.) Support both BRI and PRI
D.) Runs over existing phone lines
E.) Same as X.25
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Answer: A C D
ISDN supports voice, data, and video. It runs over existing
phone lines
and supports 128K (BRI) and T1 (PRI).
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CCNA 
