Connectionless Network Protocol (CLNP) is a connectionless network protocol of the Open System Interconnectsion (OSI) and thus equivalent to the IP protocol
. The CLNP protocol is therefore sometimes also referred to as ISO-IP. The CLNP protocol header contains similar data fields
to theIP header
. TheCLNP address fields have a length of 20 bytes
. The CLNP protocol dates from 1986 and is described in RFC 994.