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Mekhanik
2 months ago
5

Recall that with the CSMA/CD protocol, the adapter waits K. 512 bit times after a collision, where K is drawn randomly. a. For f

irst collision, how long does the adapter wait until sensing the channel again for a 1 Mbps broadcast channel? For a 10 Mbps broadcast channel?
Computers and Technology
1 answer:
Amiraneli [1K]2 months ago
5 0

Complete Question:

Remember that in the CSMA/CD protocol, after a collision, the adapter pauses for K. 512 bit times, where K is randomly chosen. a. For the first collision, if K=100, what is the waiting duration before sensing the channel again for a 1 Mbps broadcast channel? And for a 10 Mbps broadcast channel?

Answer:

a) 51.2 msec.  b) 5.12 msec

Explanation:

With K set at 100, the duration the adapter must wait after detecting a collision is calculated using the following formula:

  • Tw = K*512*bit time

The bit time is determined by the inverse of the channel's bandwidth, expressed in bits per second. Therefore, for the instances mentioned in the question, we get:

a) BW = 1 Mbps = 10⁶ bps

⇒ Tw = 100*512*(1/10⁶) bps = 51.2*10⁻³ sec. = 51.2 msec

b) BW = 10 Mbps = 10⁷ bps

⇒ Tw = 100*512*(1/10⁷) bps = 5.12*10⁻³ sec. = 5.12 msec

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