gateway
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... delivery through
multiple networks and interconnecting gateways. The internet protocol
also carries information on the precedence, security ...
... hosts connected to networks
which are in turn interconnected via gateways. It is assumed here
that the networks may be either local networks ...
... consume messages are processes. Various levels of protocols in the
networks, the gateways, and the hosts support an interprocess
communication system that provides two-way data flow ...
... destination
internet module or intermediate gateway. To transmit the datagram
through the local network ...
... then "wrapped" in a local packet suitable to the next network and
routed to the next gateway, or to the final destination.
...
... fragments if this is necessary for transmission
through the next network. To do this, the gateway produces a set of
internet datagrams ...
... Fragments may be
further broken into smaller fragments at subsequent gateways. The
internet datagram ...
... important feature is the type of service. This provides information
to the gateway (or internet module) to guide it in selecting the
service parameters ...
... security information to permit
host and gateways that operate in multilevel secure environments to
properly segregate datagrams for security considerations ...