Basic Computer Networks Questions and Answers

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Q121
In sliding window flow control, if the window size is 63, what is the range of sequence numbers ?
  • A 0 to 63
  • B 0 to 64
  • C 1 to 63
  • D 1 to 64
Answer: Option A
Q122
Which of the following decides the role (sender or receiver) of a device on a network ?
  • A line connection
  • B link connection
  • C line discipline
  • D link decision
Answer: Option C
Q123
For a sliding window of size n-1 (n sequence numbers), there can be maximum of how many frames sent but unacknowledged ?
  • A 0
  • B n - 1
  • C n
  • D n + 1
Answer: Option B
Q124
For stop-and-wait flow control, for n data packets sent, how many acknowledgment are needed ?
  • A n
  • B 2n
  • C n - 1
  • D n + 1
Answer: Option A
Q125
Pick the incorrect statement in error retransmission used in continuous ARQ method.
  • A Go-back-N method requires more storage at the receiving site
  • B selectived repeat involves complex login than GO-back-N
  • C Go-back-N has better line utilization
  • D selective repeat has better line utilization
Answer: Option C
Q126
What uses a physical star topology ?
  • A 10 base 5
  • B 10 base 2
  • C 10 base T
  • D none of the above
Answer: Option C
Q127
The monitor station in what standard ensures that one and only one token is circulating ?
  • A 802.3
  • B 802.5
  • C FDDI
  • D all of the above
Answer: Option B
Q128
What can happen at a Token Ring station ?
  • A examination of the destination address
  • B regeneration of the frame
  • C passing of the frame to the next station
  • D all of the above
Answer: Option D
Q129
In Token Ring, when a frame reaches its destination station, which of the following occurs ?
  • A The message is copied
  • B Four bits in the packet are changed
  • C the message is taken off the ring and replaced by the token
  • D Both (a) and (b) above
Answer: Option D
Q130
Which of the following is not a transceiver function ?
  • A transmission and receipt of data
  • B checking of line voltages
  • C addition and subtraction of headers
  • D collision detection
Answer: Option C

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