Data Communication and Computer Networks - Data Communication

16. What uses a physical star topology ?

  • Option : C
  • Explanation : 10 base T cable is also called as Twisted-pair- Ethernet. A star topology LAN using unshared twisted pair instead of coaxial cable
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17. The monitor station in what standard ensures that one and only one token is circulating ?

  • Option : B
  • Explanation : Here 802.3 is Ethernet, it uses CSMA/CD. But 802.5 is Token ring. It will have only one token in circulation. These are IEEE standards but FDDI is ANSI standard
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18. What can happen at a Token Ring station

  • Option : D
  • Explanation : In a token ring each station with capture the token and checks the destination address if it is addressed to any other station then the frame will be regenerated and passed to the next station
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19. In Token Ring, when a frame reaches its destination station, then

  • Option : D
  • Explanation : In Token ring, when a frame reaches its destination station, the entire message is copied and four bits in the packet are changed.
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20. Which of the following is not a transceiver function?

  • Option : C
  • Explanation : Transceiver is an acronym for transmission receiver, which receives data after checking the line voltage, hence it can't add headers.
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