1822
          BBN Report 1822, "The Specification of the Interconnection of
          a Host and an IMP".  The specification of interface between a
          host and the ARPANET.

ARPANET leader
          The control information on an ARPANET message at the host-IMP
          interface.

ARPANET message
          The unit of transmission between a host and an IMP in the
          ARPANET.  The maximum size is about 1012 octets (8096 bits).

ARPANET packet
          A unit of transmission used internally in the ARPANET between
          IMPs. The maximum size is about 126 octets (1008 bits).

Destination
          The destination address, an internet header field.

DF
          The Don't Fragment bit carried in the flags field.

Flags
          An internet header field carrying various control flags.

Fragment Offset
          This internet header field indicates where in the internet
          datagram a fragment belongs.

GGP
          Gateway to Gateway Protocol, the protocol used primarily
          between gateways to control routing and other gateway
          functions.

header
          Control information at the beginning of a message, segment,
          datagram, packet or block of data.

ICMP
          Internet Control Message Protocol, implemented in the internet
          module, the ICMP is used from gateways to hosts and between
          hosts to report errors and make routing suggestions.





 

                                                          September 1981
Internet Protocol
Glossary



Identification
          An internet header field carrying the identifying value
          assigned by the sender to aid in assembling the fragments of a
          datagram.

IHL
          The internet header field Internet Header Length is the length
          of the internet header measured in 32 bit words.

IMP
          The Interface Message Processor, the packet switch of the
          ARPANET.

Internet Address
          A four octet (32 bit) source or destination address consisting
          of a Network field and a Local Address field.

internet datagram
          The unit of data exchanged between a pair of internet modules
          (includes the internet header).

internet fragment
          A portion of the data of an internet datagram with an internet
          header.

Local Address
          The address of a host within a network.  The actual mapping of
          an internet local address on to the host addresses in a
          network is quite general, allowing for many to one mappings.

MF
          The More-Fragments Flag carried in the internet header flags
          field.

module
          An implementation, usually in software, of a protocol or other
          procedure.

more-fragments flag
          A flag indicating whether or not this internet datagram
          contains the end of an internet datagram, carried in the
          internet header Flags field.