Q4Data Communication and Computer Networks
Question
4 marks
Discuss the various error detection techniques (CRC, Checksum).
Answer
CRC uses polynomial division; Checksum uses ones' complement addition.
CRC (Cyclic Redundancy Check) appends bits based on binary polynomial division. Checksum divides data into segments, adds them using 1s complement, and sends the complement of the sum. Receiver repeats to check for zero.