____ incorporates layered communications corresponding to the OSI model's Physical, Data Link, Network, and Transport layers.
A) X.25
B) SONET
C) ISDN
D) SMDS
Correct Answer:
Verified
Q44: _ cable is preferred for ISDN cabling.
A)Twisted-pair
Q45: X.25 offers bandwidth up to 2.048 Mbps.
Q46: _ is the least universally available.
A)X.25
B)ISDN
C)frame relay
D)SMDS
Q47: When using the LMI protocol, the DLCI
Q48: One of the most promising _ projects
Q50: SMDS incorporates layers that correspond to the
Q51: Frame relay is a connection-oriented service.
Q52: The S is DSL stands for _.
A)support
B)subscriber
C)service
D)serial
Q53: How many of SONET's layers correspond to
Q54: There can only be one X.25 virtual
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