The frame check sequence (FCS) field is used for determining whether an individual frame has an error. It contains a checksum computed over the frame to provide basic protection against errors in transmission. This is a CRC code similar to the one used for other layer two protocol error protection schemes such as the one used in Ethernet. According to RFC 1662, it can be either 16 bits (2 bytes) or 32 bits (4 bytes) in size (default is 16 bits - Polynomial x16 + x12 + x5 + 1).
the frame check sequence (fcs) field is used for determining whether an individual frame has an error it contains a checksum computed over the frame to provide basic protection against errors in transmission this is a crc code similar to the one used for other layer two protocol error protection schemes such as the one used in ethernet according to rfc 1662 it can be either 16 bits (2 bytes) or 32 bits (4 bytes) in size (default is 16 bits - polynomial x16 + x12 + x5 + 1)