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A pure ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the requirement to make this frame collision-free?

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A pure ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the requirement to make this frame collision-free?

(a) 2msec

(b) 4msec

(c) 2sec

(d) 4sec

I have been asked this question in an international level competition.

My query is from Layers topic in section Cryptography Overview, TCP/IP and Communication Networks of Cryptograph & Network Security

1 Answer

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Best answer
The correct choice is (a) 2msec

To explain: Average frame transmission time

Tfr = 200 bits/200 kbps or 1 ms

Vulnerable time = 2x Tfr = 2 × 1 ms = 2 ms.

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