t.time T. Can it happen that station A detects a collision at time T+10 us (m s) if there was no collision detected between time T and T+10 μs? Just

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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a) Consider a CSMA/CD network running at 20 Mb/s over 3-km cable with no repeaters. The
signal speed in the cable is 2×108 m/s. Suppose station A starts transmitting a frame of size
400 bytes at time T.
i.
Can it happen that station A detects a collision at time T+10 us (micro
seconds) if there was no collision detected between time T and T+10 μs? Justify your
answer.
Can it happen that the station detects a collision at time T+20 μs, if there
was no collision detected between time T and T+20 us? Justify your answer.
iii.
Can it happen that the station detects a collision at time T+33 μs, if there
was no collision detected between time T and T+33 us?? Justify your answer.
Transcribed Image Text:a) Consider a CSMA/CD network running at 20 Mb/s over 3-km cable with no repeaters. The signal speed in the cable is 2×108 m/s. Suppose station A starts transmitting a frame of size 400 bytes at time T. i. Can it happen that station A detects a collision at time T+10 us (micro seconds) if there was no collision detected between time T and T+10 μs? Justify your answer. Can it happen that the station detects a collision at time T+20 μs, if there was no collision detected between time T and T+20 us? Justify your answer. iii. Can it happen that the station detects a collision at time T+33 μs, if there was no collision detected between time T and T+33 us?? Justify your answer.
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