X.25, ISDN, and frame relay use ____ for packet-switched communications.
A) routers
B) multiplexers
C) channel banks
D) virtual circuits
Correct Answer:
Verified
Q52: Multiplexers work at the OSI _ layer.
A)Network
B)Data
Q53: Which is not a common type of
Q54: A _ does not include a switchboard.
A)PBX
B)PAX
C)PABX
D)None
Q55: _ can be equipped with intelligence to
Q56: Which is not true about DSL?
A)The DSL
Q58: The DOCSIS standards are associated with _.
A)cable
Q59: Multiplexers are simply _.
A)routers
B)repeaters
C)hubs
D)switches
Q60: When a repeater retransmits a signal along
Q61: _ is software that is stored on
Q62: When referencing Class I and Class II
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