HDLC

[00u1julhccBecaBcS5d7]

hey there I'm a networking student currently struggling with this question can help me answer it it would be great and really valued the question is 

"2 HDLC (High-level Data Link Control) is a group of protocols for transmitting data between network nodes. A unique bit pattern (0111 1110) indicates the start and end of a message in HDLC. However, the same bit pattern can appear in the data. How HDLC tackles this problem? A node is transmitting the 5 data bytes given below. How can the HDLC solution be applied to the following 5 data bytes? Draw the diagram

 01110011 11110111 01111110 01001101 11111100"

[Georg Pauwen]

Hello,

the start and end flags are 0111 1110:

0111 1110<HDLC Frame>0111 1110

If the same pattern exists within the HDLC frame, a technique called 0-bit insertion is being used, which means after any sequence of 5 consecutive 1's within the payload original data, a 0-bit is inserted. In your case, the entire frame would look like this (inserted 0-bits are marked in bold)

0111 1110<01110011 111010111 011111010 01001101 111110100>0111 1110