Computer Science Networking Degree Questions - Set 17 - ObjectiveBooks
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Computer Science Networking Degree Questions - Set 17

Practice Test: Question Set - 17


1. In OSI network architecture, the dialogue control and token management are responsibilities of
    (A) Session layer
    (B) Network layer
    (C) Transport layer
    (D) Data link layer

2. 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

3. Data communications monitors available on the software market include
    (A) ENVIRON/1
    (B) TOTAL
    (C) BPL
    (D) Telenet

4. The frequency range : 300 kHz to 3 MHz is used for
    (A) AM radio transmission
    (B) FM radio transmission
    (C) TV transmission
    (D) Microwave communications, satellite and radar

5. Which of the following condition is used to transmit two packets over a medium at the same time?
    (A) Contention
    (B) Collision
    (C) Synchronous
    (D) Asynchronous

6. Parity bit 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 in detected
    (D) The ratio of the number of data units in error to the total number of data units

7. Eight stations are competing for the use of the shared channel using the modified Adaptive free walk protocol by Gallager. If the stations 7 and 8 are suddenly become ready at once, how many bit slots are needed to resolve the contention?
    (A) 1 slots
    (B) 5 slots
    (C) 10 slots
    (D) 14 slots

8. Avalanche photodiode receivers can detect hits of transmitted data by receiving
    (A) 100 photons
    (B) 200 photons
    (C) 300 photons
    (D) 400 photons

9. On a class C network with a subnet mask of 192, how many subnets are available?
    (A) 254
    (B) 62
    (C) 30
    (D) 2

10. Networks where end user workstations are tied to LAN servers to share resources and application processing.
    (A) Internetworked enterprise
    (B) Information super highway
    (C) Business applications of telecommunications
    (D) Client/Server networks

11. A remote batch-processing operation in which data is solely input to a central computer would require a:
    (A) Telegraph line
    (B) Simplex lines
    (C) Mixed band channel
    (D) All the above

12. Four bits are used for packet sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size?
    (A) 4
    (B) 8
    (C) 15
    (D) 16

13. An internetworking protocol that provides virtual circuit service across multiple X.25 protocol, is
    (A) X.75
    (B) X.25
    (C) X.400
    (D) X.21

14. 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

15. The difference between a multiplexer and a statistical multiplexer is
    (A) Statistical multiplexers need buffers while multiplexers do not need buffers
    (B) Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
    (C) Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
    (D) Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)

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