1. ICMP (Internet Control Message Protocol) is
A. a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
B. a TCP/IP high level protocol for transferring files from one machine to another
C. a protocol used to monitor computers
D. a protocol that handles error and control messages
E. None of the above
Answer: D
2. If you get both local and remote echoes, every character you type will appear on the screen
A. once
B. twice
C. three times
D. never
E. None of the above
Answer: B
3. What part of 192.168.10.51 is the Network ID, assuming a default subnet mask?
A. 192
B. 192.168.10
C. 0.0.0.5
D. 51
E. None of the above
Answer: B
4. The slowest transmission speeds are those of
A. twisted-pair wire
B. coaxial cable
C. fiber-optic cable
D. microwaves
Answer: A
5. 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.
Answer: B
6. 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
Answer: B
7. What can greatly reduce TCP/IP configuration problems?
A. WINS Server
B. WINS Proxy
C. DHCP Server
D. PDC
E. None of the above
Answer: C
8. 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
Answer: B
9. 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
Answer: D
10. 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
Answer: C
11. What is the port number for NNTP?
A. 119
B. 80
C. 79
D. 70
Answer: A
12. 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
Answer: A
13. 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
Answer: C
14. 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
Answer: A
15. Internet-like networks within an enterprise.
A. Intranets
B. Switching alternating
C. Inter organizational networks
D. Extranets
Answer: A
16. How many bits internet address is assigned to each host on a TCP/IP internet which is used in all communications with the host?
A. 16 - bits
B. 32 - bits
C. 48 - bits
D. 64 - bits
E. None of the above
Answer: B
17. With an IP address of 100, you currently have 80 subnets. What subnet mask should you use to maximize the number of available hosts?
A. 192
B. 224
C. 240
D. 248
E. 252
Answer: E
18. Which of the following types of channels moves data relatively slowly?
A. wideband channel
B. voice band channel
C. narrowband channel
D. broadband channel
E. None of the above
Answer: C
19. Which of the following is required to communicate between two computers?
A. communications software
B. protocol
C. communications hardware
D. access to transmission medium
E. All of the above
Answer: E
20. Which of the following does not allow multiple users or devices to share one communications line?
A. doubleplexer
B. multipplexer
C. concentrator
D. controller
E. None of the above
Answer: A
21. The geostationary satellite used for communication systems
A. rotates with the earth
B. remains stationary relative to the earth
C. is positioned over equator
D. All of the above
E. None of the above
Answer: D
22. Telecommunication networks frequently interconnect an organization with its customers and suppliers. Select the best fit for answer:
A. Bandwidth alternatives
B. Switching alternating
C. Inter organizational networks
D. Extranets
Answer: C
23. The packets switching concept was first proposed
A. in the late 1980s for the Defense Ministry of US.
B. in the early 1960s for military communication systems, mainly to handle speech
C. in the late 1950s for Defense Ministry of US
D. All of the above
E. None of the above
Answer: B
24. The _____ houses the switches in token ring.
A. transceiver
B. nine-pin connector
C. MAU
D. NIC
E. None of the above
Answer: C
25. What device separates a single network into two segments but lets the two segments appear as one to higher protocols?
A. Switch
B. Bridge
C. Gateway
D. Router
Answer: B
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