This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Local Area Networks LAN – FDDI ”.

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1. An FDDI LAN can use _______ as a medium.

  • any metallic cable
  • copper cable
  • fiber optic cable
  • b or c

2. Token Ring and FDDI both use _______ as an access method.

  • CSMA
  • CSMA/CD
  • token passing
  • HDLC

3. An FDDI synchronous data frame means that _______.

  • the information is real-time
  • the information is not real-time
  • the information comes from the SDLC protocol
  • the information is time-division multiplexed

4. Each station on an FDDI ring has a _______ register while there is just one _______ register for the entire FDDI ring

  • SA; TTRT
  • TTRT; SA
  • AMT; SA
  • SA; TRT

5. The _______ register holds a value equal to twice the _______.

  • AMT; TTRT
  • TTRT; AMT
  • AMT; SA
  • TTRT; SA

6. If a token traverses the FDDI ring in a time greater than the _______, the ring gets reinitialized

  • SA
  • TTRT
  • TRT
  • AMT

7. The _______ is the average time required for a token to circulate the ring exactly once

  • SA
  • TTRT
  • AMT
  • TAM

8. The sum of the _______ should be a value close to the TTRT.

  • SAs
  • TTRTs
  • AMTs
  • TAMs

9. The _______ is a measure of an actual cycle time while the _______ is an average cycle value set at ring initialization

  • TRT; THT
  • THT; TRT
  • THT; TTRT
  • TRT; TTRT

10. The THT is a function of the _______ and _______.

  • AMT; TTRT
  • TTRT; TRT
  • SA; TTRT
  • AMT; SA

11. The _______ is always 0 when the token arrives at an FDDI station

  • TTRT
  • TRT
  • THT
  • SA

12. An FDDI station sends asynchronous data as long as the _______ value is positive

  • TTRT
  • TRT
  • THT
  • SA

13. When the token leaves an FDDI station, the TRT value is _______.

  • 0
  • some positive value
  • some negative value
  • greater than TTRT but less than SA

14. FDDI specifies _______ encoding prior to NRZ-I encoding.

  • 4B/5T
  • 3B/4B
  • 5B/4B
  • 4B/5B

15. Which of the following is not a protocol in the FDDI standard?

  • PMD
  • PHY
  • MAC
  • HDLC

16. Which type of FDDI node has two MICs?

  • DAS
  • SAS
  • DAC
  • a and c

17. Which type of FDDI node has one MIC?

  • DAS
  • SAS
  • DAC
  • a and c

18. How many MICs are need for a DAC connecting 3 workstations to an FDDI ring?

  • 2
  • 3
  • 4
  • 5

19. In FDDI, when all synchronous data have been sent and the THT value is still positive, _______.

  • no asynchronous data can be sent
  • asynchronous data can be sent
  • all asynchronous data have been sent
  • any of the above

20. One MAU can support _______ stations.

  • 5
  • 8
  • 32
  • any number of

21. An MAU is a device used in _______.

  • Ethernet
  • Token Ring
  • FDDI
  • all of the above

22. An SAS is a device used in _______.

  • Ethernet
  • Token Ring
  • FDDI
  • all of the above
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