QUESTION BANK
CHAPTER 5
THE LINK LAYER AND LOCAL AREA NETWORKS
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Explain the one bit sliding window protocol and go back n protocol. Write down
the drawback of both the protocols.
Explain piggybacking, 1-bit sliding window protocol with go back n and selective
repeat.
Why CSMA/CA is used for wireless network? Explain it.
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Differentiate : Router and Switch
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Explain : MAC address and IP address
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Define
a) nonpersistent CSMA
b) p-persistent CSMA.
What is the similarity and difference between switch and bridge? Also explain cut
through switch.
Write the two differences between Ethernet and wireless LAN 802.11 in the
physical and data link layers.
Explain the at least three basic network criteria that are important for the good
functioning of the overall network.
Explain working principle of HDLC
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Explain the working principle of bridges
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What is Hamming Code? Explain how it is useful in error correction.
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Explain ALOHA protocol with its varieties.
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Discuss Design Issues in Data link Layer.
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Give differences between
1. Connection oriented versus Connection less services
2. Flow Control versus Congestion control
Enlist various framing techniques used in data link layer. Explain any one in detail
with suitable example.
What is the difference between error detection and correction? Explain any one
error correction technique with suitable example.
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Explain CSMA and CSMA/CD protocols
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19
A bit stream 110101011 is transmitted using standard CRC method . The
generator polynomial is x4+x+1 .Show the actual bit string transmitted.
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Generate CRC code for 1 0 1 1 1 0. Generator is 1001.
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Find Humming Code for 1001000.
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