$($i$)$ Consider the LLC which uses the flag bits with bit stuffing method for data

framing. The sending LLC receives the stream of data shown in Figure $4\mathrm{.}1$ below:

$111111111111011111011110111111111111111000111011111$

Figure $4\mathrm{.}1$

Write down the stream of the data as they appear on the line after the framing with the

bit stuffing.

$($ii$)$ Consider the LLC sub$-$layer of Data Link Layer which uses the flag bytes with

byte stuffing method for data framing. If the sending LLC receives the stream of the

data encrypted with ASCII code shown in Figure $4\mathrm{.}2$ below:

D FLAG $11111110$ @ A B C ESC FLAG ESC FLAG FLAG $00$ FLAG ESC

Figure $4\mathrm{.}2$

Write down the stream of the data as they appear on the line after the framing with the

byte stuffing.