The earliest wide area data networks were built using _____.
A) phone lines
B) t-carriers
C) ATM
D) X) 25
Correct Answer:
Verified
Q2: ISDN stands for _.
A)inter-state data network
B)inter-state digital
Q3: In data communications,a virtual circuit _.
A)can carry
Q4: The statistically multiplexed WAN technology that is
Q5: WAN technologies use broadcast.
Q6: T-1 is the simplest WAN data service
Q8: T-3 is a very popular WAN data
Q9: Virtual circuit IDs are _.
A)global
B)shared among neighboring
Q10: A popular TDM WAN technology is _.
A)frame
Q11: When a device has data to be
Q12: Compared to point-to-point links,statistically multiplexed WANs improve
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