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Total Questions : 885 | Page 17 of 89 pages
Question 161. The method of communication in which transmission takes place in both directions, but only one direction at a time is called
  1.    Half Duplex
  2.    Simplex
  3.    Full Duplex
  4.    Four wire circuit
 Discuss Question
Answer: Option A. -> Half Duplex
Question 162. Error detection at the data link level is achieved by
  1.    Equalization
  2.    Cyclic Redundancy Code
  3.    Hamming Code
  4.    Bit Stuffing
 Discuss Question
Answer: Option B. -> Cyclic Redundancy Code
Question 163. Which of the following is a wrong example of network layer?
  1.    Source routing and domain naming-USENet
  2.    X.25 level 2-ISO
  3.    X.25 Packet Level Protocol (PLP)-ISO
  4.    Internet Protocol (IP) - ARPANET
 Discuss Question
Answer: Option B. -> X.25 level 2-ISO
Question 164. The topology with highest reliability is:
  1.    Ring topology
  2.    Mesh topology
  3.    Bus topology
  4.    Star topology
 Discuss Question
Answer: Option B. -> Mesh topology
Question 165. Start and stop bits are used in serial communication for
  1.    Error correction
  2.    Slowing down the communication
  3.    Error detection
  4.    Synchronization
 Discuss Question
Answer: Option D. -> Synchronization
Question 166. Which one of the following network uses dynamic or adaptive routing?
  1.    SNA(IBM's System Network Architechture)
  2.    ARPANET
  3.    None of these
  4.    TYMNET
 Discuss Question
Answer: Option B. -> ARPANET
Question 167. How many Character per sec(7bits + 1parity) can be transmitted over a 2400 bps line if the transfer is synchronous (1 "Start" and 1 "stop" bit)?
  1.    300
  2.    250
  3.    240
  4.    275
 Discuss Question
Answer: Option A. -> 300
Question 168. Unmodulated signal coming from a transmitter is know as
  1.    None of these
  2.    Primary signal
  3.    Baseband signal
  4.    Carrier signal
 Discuss Question
Answer: Option C. -> Baseband signal
Question 169. The number of cross point needed for 10 lines in a cross point switch which is full duplex in nature and there are no self connection is
  1.    45
  2.    90
  3.    100
  4.    50
 Discuss Question
Answer: Option A. -> 45
Question 170. A terminal multiplexer has six 1200 bps terminals and 'n' 300bps terminals connected to it. The outgoing line is 9600bps. What is the maximum value of n?
  1.    4
  2.    28
  3.    16
  4.    8
 Discuss Question
Answer: Option D. -> 8

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