GATE CS 2024 Set 2 — Question 55
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Computer Networks → Medium Access & LANs → CSMA/CD
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Question
Consider an Ethernet segment with a transmission speed of bits/sec and a maximum segment length of 500 meters. If the speed of propagation of the signal in the medium is meters/sec, then the minimum frame size (in bits) required for collision detection is _________
Correct answer
500 to 500
Solution
In an Ethernet network using CSMA/CD, to ensure that a collision is detected by the transmitting station before it finishes transmitting the frame, the transmission time () must be at least twice the propagation delay () between the two farthest points in the segment.Given:
- Transmission speed (Bandwidth, ) = bits/sec
- Maximum segment length () = 500 meters
- Speed of propagation () = meters/sec
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