Basic Computer Networks Questions and Answers

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Q141
Which of the following uses an 8B/6T encoding scheme ?
  • A 100 Base-TX
  • B 100 Base-FX
  • C 100 Base-T4
  • D 100 Base-T1
Answer: Option C
Q142
IBM's Token-Ring network uses
  • A adaptive routing
  • B source routing
  • C alternative routing
  • D spanned tree routing
Answer: Option A
Q143
The systems that can be used in both priority and nonpriority modes, is
  • A TDM
  • B register insertion
  • C carrier sense systems
  • D token passing
Answer: Option
Q144
In a crossbar with 1000 crosspoints, how many statistically are in use at any time ?
  • A 100
  • B 250
  • C 500
  • D 1000
Answer: Option C
Q145
In which circuit switching, delivery of data is delayed because data must be stored and retrieved from RAM ?
  • A space-division
  • B time-division
  • C virtual
  • D packet
Answer: Option B
Q146
Which of the following can be handled by a gateway ?
  • A protocol conversion
  • B packet resizing
  • C data encapsulation
  • D both (a) and (b)
Answer: Option A
Q147
Gateways function in which OSI layers ?
  • A the lower three
  • B the upper four
  • C all seven
  • D all but the physical layer
Answer: Option C
Q148
repeaters function in which layer(s) ?
  • A physical
  • B data link
  • C network
  • D both (a) and (b)
Answer: Option A
Q149
Bridges function in which layer(s).
  • A physical
  • B data link
  • C network
  • D both (a) and (b)
Answer: Option D
Q150
routers function in which layers ?
  • A physical and data link
  • B physical data link, and network
  • C data link and network
  • D network and transport
Answer: Option B

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