LAN and Access Algorithm Techniques MCQ’s

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This set of Digital Communications Systems Multiple Choice Questions & Answers (MCQs) focuses on “LAN and Access Algorithm Techniques”.

1. Bit stuffing is done by inserting _____, after ____ consecutive ones.
a) Zero, seven
b) Zero, five
c) One, seven
d) One, five

2. For a throughput of value less than 0.20, which has less average delay?
a) S-ALOHA
b) Pure ALOHA
c) R-ALOHA
d) None of the mentioned

3. The minimum packet size of Ethernet is
a) 81 bytes
b) 75 bytes
c) 72 bytes
d) 64 bytes

4. Which method is better suited for a large population?
a) Straight polling
b) Binary tree search
c) Straight polling & Binary tree search
d) None of the mentioned

5. A local area network can be used to interconnect
a) Computers
b) Terminals
c) Printers
d) All of the mentioned

6. In Aloha technique, the re-transmission takes place immediately.
a) True
b) False

7. Binary tree search is used for
a) Multiple users
b) Single users
c) Single & Multiple users
d) None of the mentioned

8. The maximum packet size of Ethernet is
a) 1426 bytes
b) 1526 bytes
c) 1256 bytes
d) 1626 bytes

9. As channel capacity increases, channel throughput
a) Increases
b) Decreases
c) Remains the same
d) None of the mentioned

10. For a throughput value of 0.20 to 0.67, which has less average delay?
a) S-ALOHA
b) Pure ALOHA
c) R-ALOHA
d) None of the mentioned

11. For a higher throughput value which method works efficiently?
a) S-ALOHA
b) Pure ALOHA
c) R-ALOHA
d) None of the mentioned

12. The interface between the ring and the stations is passive.
a) True
b) False

13. In which technique, packet size are constant?
a) Pure Aloha
b) Slotted Aloha
c) Pure & Slotted Aloha
d) None of the mentioned

14. LAN uses _________ cables.
a) Low bandwidth
b) High bandwidth
c) Low & High bandwidth
d) None of the mentioned

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