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CRC COMPUTER NETWORK PRESENTATION .pptx
- 2. Cyclic Redundancy Check CRC or Cyclic Redundancy Check is a method of detecting errors in the communication channel uses Generator Polynomial which is available on both sender and receiver side.
- 3. CRC Generation AtSender Side Find the Length of Divisor 'L’ Append 0 'L-1'bits to the original bits Perform Binary Digit Operation Remainder of the division=CRC
- 4. Receiver Side Codeword received at the receiver side 100100001(data + CRC) Therefore, the remainder is all zeros. Hence, the data received has no error.
- 5. At The ReceiverSide Receiver divides received data (data + CRC) with generator.If remainder is zero, data is correctly received.Else, there is error.
- 6. Finally, CyclicRedundancy check will be generated as shown.
- 7. Advantages of CRC Cyclic codes have a very good performance in detecting single-bit errors, double errors, an odd number of errors. They can easily be implemented in hardware and software. They are especially fast when implemented in hardware. This has made cyclic codes a good candidate for many networks.
- 8. The senderperforms a division operation on the bits being sent and calculates the remainder. Before sending the actual bits, the sender adds the remainder at the end of the actual bits.(Data Bits+ Remainder)
- 9.