Connectionless-mode Network Service

Connectionless Network Protocol ( CLNP ) is a network protocol and is specified in RFC 994 and ISO 8473. It operates at the network layer according to the OSI model and basically offers the same services as the Internet Protocol ( IP).

However, it is for use in administered networks designed and is now used mainly in large telecommunication networks use. In contrast to IP is not only the target is specified, but the entire route including the source and destination address. The address format is not specified, so that different networks may be linked. RFC 1069 describes how IP addresses are used.

CLNP is a connectionless protocol. It is the interface between the CLNS ( Connectionsless Network Service ) and the upper layers of the OSI model. By a flag of the source router can choose whether he wants to be notified in case of transmission error. Otherwise, the header contains information similar to that in an IP header:

  • Datagram Size
  • Fragmentation
  • Header checksum
  • Time-to- Live (TTL)
  • Options
Flag word IP fragmentation Time to Live
194129
de