Functions of OSI and TCP/IP Layers Q.2

2A bit-stuffing based framing protocol uses an 8- bit delimiter pattern of 01111110. If the output bit-string after stuffing is 01111100101, then the input bit-string is

Option : B
Explanation : The given 8-bit delimiter pattern is 01111110.
The output bit-string after stuffing is 01111100101.
The above bold underline bit is stuffed bit.
So input bit-string must be 0111110101.

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