721. The slowest transmission speeds are those of
A. twisted-pair wire
B. coaxial cable
C. fiber-optic cable
D. microwaves

722. A noiseless 3 KHz Channel transmits bits with binary level signals. What is the maximum data rate?
A. 3 Kbps
B. 6 Kbps
C. 12 Kbps
D. 24 Kbps.

723. What can greatly reduce TCP/IP configuration problems?
A. WINS Server
B. WINS Proxy
C. DHCP Server
D. PDC
E. None of the above

724. 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

725. 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

726. What is the port number for NNTP?
A. 119
B. 80
C. 79
D. 70

727. Eight stations are competing for the use of a shared channel using the ‘Adaptive tree Walk Protocol’. If the stations 7 and 8 are suddenly become ready at once, how many bit slots are needed to resolve the contention?
A. 7 slots
B. 5 slots
C. 10 slots
D. 14 slots

728. Usually, it takes 10-bits to represent one character. How many characters can be transmitted at a speed of 1200 BPS?
A. 10
B. 12
C. 120
D. 1200
E. None of the above

729. To connect a computer with a device in the same room, you might be likely to use
A. a coaxial cable
B. a dedicated line
C. a ground station
D. All of the above
E. None of the above

730. Internet-like networks within an enterprise.
A. Intranets
B. Switching alternating
C. Inter organizational networks
D. Extranets