3.4 Questions

1. Bit Stuffing/De-stuffing

1.1 Question 01

The bit string has been received by a receiver while flag byte with bit stuffing is used for framing, with 01111110 as the flag. Destuff the data and identify the boundaries between different frames, if there exists any.

The de-stuffed data should be:

2. Error Detection

2.1 Question 01

Using CRC method for bit string , with the generator polynomial ,

1. Derive the codeword, with the calculation steps shown clearly.
2. Assuming the received message contains an error on the 6th bit from the right (i.e., the error polynomial is ), can the error be detected? Show your answer with detailed steps.