COMPUTER
NETWORKS
Lecture-6
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Lecture-6: Error Detection and Correction in Computer Networks, Slides of Computer Networks
A portion of a computer networks lecture, focusing on error detection techniques such as parity check, checksum, and crc. It also discusses the advantages of crc over checksum and the types of errors that crc can detect. Examples of 16-bit crc hardware and its operation.
Typology: Slides
2011/2012
1 / 8
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COMPUTER
NETWORKS
Lecture-
Review of lecture 5
Byte Stuffing
Transmission Errors
Error Detection
- Parity Check
- Checksum
- CRC
Combining Building Blocks
(cont’d)
Combining Building Blocks
(cont’d)
- Input data is all 1s
- CRC shown after 15,16,17 bits shifted
- Feedback introduces 0s in CRC
Frame Format And Error
Detection
Modified frame format including CRC
Error in frame typically causes receiver to
discard frame
Is Byte stuffing also required for CRC
itself?
Frame Format And Error
Detection