Computer Science Computer Networking Questions - Set 21 - ObjectiveBooks

Computer Science Computer Networking Questions - Set 21

Practice Test: Question Set - 21

1. You have purchased a MAU (Multistation Access Unit) from your computer supplier and now must decide what type of network card you should install in the workstations. Which of the following would be the most appropriate?
    (A) Fast SCSI Wide
    (B) Token-Ring
    (C) ArcServe
    (D) Ethernet

2. RS-449/442-A/423-A is
    (A) A set of physical layer standards developed by EIA and intended to replace RS-232-C
    (B) A check bit appended to an array of binary digits to make the sum of the 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

3. The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as:
    (A) Modulation
    (B) Demodulation
    (C) Synchronizing
    (D) Synchronizing

4. An error-detecting code inserted as a field in a block of data to be transmitted is known as
    (A) Frame check sequence
    (B) Error detecting code
    (C) Checksum
    (D) Flow control

5. Which of the following summation operation is performed on the bits to check an error-detecting code?
    (A) Codec
    (B) Coder-decoder
    (C) Checksum
    (D) Attenuation

6. The most flexibility in how devices are wired together is provided by
    (A) Bus networks
    (B) Ring networks
    (C) Star networks
    (D) T-switched networks

7. The receive equalizer reduces delay distortions using a
    (A) Tapped delay lines
    (B) Gearshift
    (C) Descrambler
    (D) Difference engine

8. The main difference between synchronous and asynchronous transmission is
    (A) The clocking is derived from the data in synchronous transmission
    (B) The clocking is mixed with the data in asynchronous transmission
    (C) The pulse height is different
    (D) The bandwidth required is different

9. In cyclic redundancy checking what is the CRC?
    (A) The divisor
    (B) The quotient
    (C) The dividend
    (D) The remainder

10. The communication mode that supports two-way traffic but only one direction at a time is 
    (A) Simplex
    (B) Duplex
    (C) Half duplex
    (D) Multiplex

11. The 802.5 standard implements a way for preventing collisions on the network. How are collisions prevented when using this standard?
    (A) CSMA/CD
    (B) Token passing
    (C) Collision detection
    (D) Time sharing

12. Phase shift keying (psk) method is used to modulate digital signals at 9600 bps using 16 levels. Find the line signaling speed (i.e., modulation rate)
    (A) 2400 bands
    (B) 1200 bands
    (C) 4800 bands
    (D) 9600 bands

13. 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

14. Business meeting and conferences can be held by linking distantly located people through a computer network. Not only the participants exchange information but are able to see each other. What is it called?
    (A) Telemeeting
    (B) Telemailing
    (C) Teleconferencing
    (D) Teletalking

15. To set up a bulletin board system you need
    (A) A smart modem with auto-answer capabilities
    (B) A telephone line
    (C) A personal computer
    (D) All of the above

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