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Header check sequence
Error checking feature of some header data structures From Wikipedia, the free encyclopedia
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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.
 | This article may be too technical for most readers to understand. (July 2018) |
The HCS can be one octet long, as in WiMAX,[1] or a 16-bit value for cable modems.[2]
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