Mid Term Question
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CS601 GDB NO. 1 FALL 2022 |
GDB TOPIC
A company has a small
network in which some nodes exchange data with each other. Two nodes of this
network, node ‘A’ and node ‘B’ are specifically configured in such a way that
the node ‘A’ can send data to the node ‘B’ as per the following specifications:
·
The data will be sent frame by frame.
·
Communication will be unidirectional.
·
An acknowledgment will be received before
sending the next frame.
·
The propagation time is lesser than the
transmission time of the frame.
·
The communication channel is noiseless.
Keeping in view the above
scenario, you are required to suggest which data link layer protocol will be
the most suitable from the following:
·
Address Resolution Protocol
·
Simple Protocol
·
Stop and Wait Protocol
·
Go-Back-N Protocol
Also, mention one
Advantage and one Disadvantage of that suggested protocol.
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SOLUTION:
Protocol Name:
Stop and Wait for Protocol
Advantage:
The main advantage is
their accuracy. The next frame is transmitted only when the first frame is
acknowledged. So, there is no chance of the frame being lost. It is used in
Connection-oriented communication. It offers error and flows control. It can be
used in data Link and transport Layers.
Disadvantage:
The drawback of the Stop and
Wait Protocol is that it is inefficient. It makes the transmission process
slow. If two devices are a distance apart, a lot of time is wasted waiting for
ACKs leading to an increase in total transmission time.
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