Source: wikibot/header-check-sequence
= Header check sequence
{wiki=Header_check_sequence}
The term "header check sequence" (HCS) typically refers to a method used in data communication and network protocols to ensure the integrity of the transmitted data. It is a form of error detection that involves calculating a checksum value based on the contents of a data header before transmission and then checking that value upon receipt to determine if the transmission was successful and without errors.