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3 votes
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In a data link protocol, the following character encoding is used:
A → 01000111 B → 11100011 FLAG → 01111110 ESC → 11100000
Assuming that byte stuffing is employed for the four character frame A B ESC FLAG, transmitter sends it as:

A. 01111110 01000111 11100011 11100000 11100000 01111110

B. 01111110 01000111 11100011 11100000 11100000 01111110 01111110

C. 01111110 01000111 11100011 11100000 11100000 11100000 01111110 01111110

D. None of these

1 Answer

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3 votes

Answer would be C.

First octet represents Start and Last Octet represent Stop.

And both ESC and FLAG will follow a Escape character so as to not get misinterpreted during communication.

01111110[START] 01000111[A] 11100011[B] 11100000[ESC] 11100000[ESC] 11100000[ESC] 01111110[FLAG] 01111110[STOP]

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