Editing Frame check sequence (section)

==Types==
By far the most popular FCS algorithm is a [[cyclic redundancy check]] (CRC), used in Ethernet and other IEEE 802 protocols with 32 bits, in [[X.25]] with 16 or 32 bits, in [[HDLC]] with 16 or 32 bits, in [[Frame Relay]] with 16 bits,<ref name="cisco-technote-fr">{{cite web
 | url = http://www.cisco.com/c/en/us/support/docs/wan/frame-relay/47202-87.html
 | title = Frame Relay Glossary
 | date = 2009-04-30 | access-date = 2015-07-05
 | publisher = [[Cisco Systems]]
}}</ref> in [[Point-to-Point Protocol]] (PPP) with 16 or 32 bits, and in other [[data link layer]] [[communications protocol|protocols]].

Protocols of the [[Internet protocol suite]] tend to use [[checksum]]s.<ref>{{cite IETF |rfc=1071 |title=Computing the Internet Checksum}}</ref>