31. Carrier is
A. One or more conductors that serve as a common connection for a related group of devices
B. a continuous frequency capable of being modulated or impressed with a second signal
C. the condition when two or more sections attempt to use the same channel at the same time
D. a collection of interconnected functional units that provides a data communications service among stations attached to the network
E. None of the above
32. What can greatly reduce TCP/IP configuration problems?
A. WINS Server
B. WINS Proxy
C. DHCP Server
D. PDC
E. None of the above
33. In CRC there is no error if the remainder at the receiver is _____.
A. equal to the remainder at the sender
B. zero
C. nonzero
D. the quotient at the sender
34. Which of the following statements is correct for the use of packet switching?
A. the subdivision of information into individually addressed packets in conjunction with alternative routing arrangement enabled the transmission path to be altered in the event of congestion or individual link failure
B. the employment of additional intelligence within the network enabled more sophisticated error control and link control procedures to be applied
C. by employing wide bandwidth circuits for the trunk networks substantial economies through extensive sharing of capacity could be achieved.
D. All of the above
E. None of the above
35. A front-end processor is
A. a user computer system
B. a processor in a large-scale computer that executes operating system instructions
C. a minicomputer that relieves main-frame computers at a computer centre of communications control functions
D. preliminary processor of batch jobs.
E. None of the above