1. FDDI is a
A. ring network
B. star network
C. mesh network
D. bus based network
E. None of the above
Answer: A
2. An anticipated result from multiprogramming operations is:
A. reduced computer idle time
B. the handling of more jobs
C. better scheduling of work
D. All of the above
E. None of the above
Answer: D
3. A central computer surrounded by one or more satellite computers is called a
A. bus network
B. ring network
C. star network
D. All of the above
E. None of the above
Answer: C
4. If delays are recorded as 10 bit numbers in a 50 router network, and delay vectors are exchanged twice a second, how much bandwidth per fill duplex line is occupied by the distributed routing algorithm?
A. 500 bps
B. 1500 bps
C. 5 bps
D. 1000 bps
Answer: D
5. HOSTS file entries are limited to how many characters?
A. 8
B. 255
C. 500
D. Unlimited
E. None of the above
Answer: B
6. Demodulation is the process of
A. converting digital signals to analog signals
B. converting analog signals to digital signals
C. combining many low speed channels into one high speed channel
D. dividing the high-speed signals into frequency bands
E. None of the above
Answer: B
7. Which of the following statement is incorrect?
A. The Addresses Resolution Protocol, ARP, allows a host to find the physical address of a target host on the same physical network, given only the target IP address.
B. The sender's IP - to- physical address binding is included in every ARP broadcast; receivers update the IP-to-Physical address binding information in their cache before processing an ARP packet.
C. ARP is a low-level protocol that hides the underlying network physical addressing, permitting us to assign IP-addresses of our choice to every machine.
D. All of the above
E. None of the above
Answer: D
8. You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 25 hosts and a maximum number of subnets?
A. 255.255.255.192
B. 255.255.255.224
C. 255.255.255.240
D. 255.255.255.248
E. 255.255.255.252
Answer: B
9. Which of the following best illustrates the default subnet mask for a class A,B, and C Network?
A. 0.0.0.0, 0.0.0.1, 0.0.1.1
B. 255.255.255.0, 255.255.0.0, 255.0.0.0
C. 255.0.0.0, 255.255.0.0, 255.255.255.0
D. 255.255.0.0, 255.255.255.0, 255.255.255.255
E. None of the above
Answer: C
10. Modulation is the process of
A. converting analog signals to digital signals
B. converting digital signals to analog signals
C. Multiplexing various signals into high speed line signals
D. performing data encryption.
Answer: B
11. Devices interconnected by the LAN should include
A. Computers and terminals
B. mass storage device, printers and plotters
C. bridges and gateways
D. All of the above
E. None of the above
Answer: D
12. What are the data transmission channels available for carrying data from one location to another?
A. Narrowband
B. Voice band
C. Broadband
D. All of the above
E. None of the above
Answer: D
13. On a class B network, how many hosts are available at each site with a subnet mask of 248?
A. 16,382
B. 8,190
C. 4,094
D. 2,046
E. 1,022
Answer: D
14. Which of the following technique is used for encapsulation?
A. a technique used in best-effort delivery systems to avoid endlessly looping packets.
B. a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame.
C. One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size
D. All of the above
E. None of the above
Answer: B
15. You are working with three networks that have the network IDs 192.168.5.0, 192.168.6.0, and 192.168.7.0. What subnet mask can you use to combine these addresses into one?
A. 255.255.252.0
B. 225.255.254.0
C. 255.255.255.240
D. 255.255.255.252
Answer: A
16. With an IP address set starting with 150, you currently have six offices that you are treating as subnets. Plans are in place to open 10 more offices before the end of the year. What subnet mask should you use to satisfy the needed number of subnets and maximize the number of hosts available at each site?
A. 192
B. 224
C. 240
D. 248
E. 252
Answer: D
17. A machine that connects to two or more electronic mail systems and transfers mail messages among them is known as
A. Gateways
B. mail gateway
C. bridges
D. User Agent
E. None of the above
Answer: B
18. If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is
A. 1200 bands
B. 3200 bands
C. 4800 bands
D. 9600 bands
E. None of the above
Answer: B
19. Error detection at a data link level is achieved by
A. bit stuffing
B. cyclic redundancy codes
C. Hamming codes
D. equalization
Answer: B
20. When the computer provides the manager with a multiple choice of possible answers, the prompting technique is
A. question and answer
B. form filling
C. open-ended question
D. menu selection
E. None of the above
Answer: D
21. Which network topology is considered passive?
A. Cross
B. Ring
C. Star
D. Mesh
E. Bus
Answer: E
22. If a firm wanted to transmit data from 1,000 punched cards to a remote computer, they would use a(n)
A. POS terminal
B. data collection terminal
C. batch processing terminal
D. intelligent terminal
E. None of the above
Answer: C
23. Which address is the loopback address?
A. 0.0.0.1
B. 127.0.0.0
C. 127.0.0.1
D. 255.255.255.255
E. None of the above
Answer: C
24. Error rate is
A. an error-detecting code based on a summation operation performed on the bits to be checked.
B. a check bit appended to an array of binary digits to make the sum of all the binary digits.
C. a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and thus the presence of the errors is detected.
D. the ratio of the number of data units in error to the total number of data units
E. None of the above
Answer: D
25. Intranets and extranets can use their network fire walls and other security features to establish secure Internet links within an enterprise or with its trading partners. Select the best fit for answer:
A. Network Server
B. Virtual Private Network
C. Network operating system
D. OSI
Answer: B
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