Cyclic Redundancy Check for Error Detection || Lesson 17 || Computer Networks || Learning Monkey ||

Here we will understand Cyclic Redundancy Check for Error Detection.
Steps to be followed in CRC Division:
1. The Generator uses a divisor whose size (k bits) and value is predefined and agreed by sender and receiver.
2. The Data word which has to be divided by the divisor has to be appended with (k-1) 0'S.
3. In the process of division, the bits of the divisor are XORed with the bits of dividend.
4. The leftmost bit of the result obtained is discarded.
5. One bit is pulled down to make the divided kbit long.
6. If the left most bit of the result is 0, then we have to use the divisor as all 0's.
7. If the left most bit of the result is 1, then we have to use the divisor as it is.
8. Repeat steps 4, 5, 6, and 7 until the final remainder is obtained.






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