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Header check sequence
Error checking feature of some header data structures

A header check sequence (HCS) is an error checking feature for various header data structures, such as in the media access control (MAC) header of Ethernet. It may consist of a cyclic redundancy check (CRC) of the frame, obtained as the remainder of the division (modulo 2) by the generator polynomial multiplied by the content of the header excluding the HCS field.

The HCS can be one octet long, as in WiMAX, or a 16-bit value for cable modems.

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See also

References

  1. "Project 802.16d: Working Document (System Profiles for 2–11 GHz)" (PDF). September 2004. Archived (PDF) from the original on March 5, 2016. Retrieved October 29, 2007. http://wirelessman.org/tgd/docs/80216d-03_01.pdf

  2. "Data-Over-Cable Interface Specifications, Radio Frequency Interface Specification" (PDF). March 26, 1997. Archived from the original (PDF) on May 25, 2011. Retrieved October 29, 2007. https://web.archive.org/web/20110525094347/http://www.cablelabs.com/specifications/SP-RFI-I01-970326.pdf