Look up the checksum width and hex length for common CRC standards (CRC-8, CRC-16, CRC-32) for protocol design.
常见 CRC-8/CRC-16/CRC-32。
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| CRC width | Width r is the generator degree, bounding random-error escape probability at 2−r | ISO/IEC 3309 HDLC frame check sequence |
| Computation | Shift the message left by r bits, divide modulo 2 by the generator, and keep the remainder | ITU-T X.25 §2.2.7.4 Frame Check Sequence |
| Common polynomials | CRC-32 = 0x04C11DB7 with r = 32; CRC-16-CCITT = 0x1021 with r = 16 | Koopman & Chakravarty, Cyclic Redundancy Code Polynomial Selection, 2004 |