The document discusses cyclic redundancy check codes, which are error detection codes used to detect errors in digital data during transmission. It explains how CRC works at the transmitter and receiver, including detecting errors using a polynomial representation of bits and standard polynomials. Videos are available online providing further explanation of CRC operation, the relationship between bits, characteristics of good divisor polynomials, and references.

1. Communication
Networks
- Data Link Layer
[Error Detection
& Correction Codes]
Cyclic Redundancy Check Code

2. Video Lectures for these Slides are
available at
www.youtube.com/GURUKULA

3. Error Detection Codes
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•
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Error Correction Codes
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4. 3. Cyclic Redundancy Check - CRC

5. CRC - Transmitter
Explanation Video Available
at
www.youtube.com/GURUKULA

6. CRC – Receiver [Without Error]
Explanation Video Available
at
www.youtube.com/GURUKULA

7. CRC – Receiver [With Error]
Explanation Video Available
at
www.youtube.com/GURUKULA

8. Polynomial Representation of Bits

9. Relation Between the Bits in CRC
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•
•
Explanation Video Available
at
www.youtube.com/GURUKULA

10. Characteristics of Good Divisor Polynomial

11. Few Standard Polynomials for CRC

12. References:
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