What is HEC (Header Error Check)?

Header Error Check is a test strategy utilized to decide if an Asynchronous Transfer Mode technology cell has been received correctly. The Header Error Control field is an 8bit Cyclic Redundancy Code inside the header of the Asynchronous Transfer Mode cell. It is utilized to examine the validity of the ATM cell control data. It is utilized in Asynchronous Transfer Mode (ATM), DQDB header, FHSS data frame, DSSS data frame and WLANs.