Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

Glossary 315
Glossary
interactive communications
Processing that allows users to
enter commands and data at the
terminal and receive an
immediate response. Interactive
processing occurs in session mode
on MPE/iX systems.
internet communication
Communication that occurs
between networks.
internet hop count The
number of full gateways plus the
numberof gateway-halflinksthat
a packet must pass through in
moving from source node to
destination.
Intranet Protocol A protocol
used to provide routing between
different local networks in an
internetwork, as well as among
nodes in the same local network.
TheInternetProtocolcorresponds
to Layer 3, the Network Layer, of
the OSI model. See also IP
address.
internet routing Internet
routing involves all the processes
required to route a packet from a
node on one network to a
destination node on another
network.
intrinsic A system routine
accessible by user programs. It
provides an interface to operating
system resources and functions.
Intrinsics perform common tasks
such as file access and device
control.
IP See Internet Protocol
IP address Internet Protocol
address. An address used by the
Internet Protocol to perform
internet routing. A complete IP
address consists of a network
portion and a node portion. The
network portion of the IP address
identifies a network, and the node
portion identifies a node within
the network.
IP router A node in an IP
network that connects two or
more networks and provides
address mapping between them.
The router selects messages from
incoming buffers and places them
into the appropriate outgoing
message queues.
ISO International Organization
of Standards. An international
federation of national standards
organizations involved in
developing international
standards, including
communication standards.
L
LAN Local Area Network. A
collection of data communication
systems sharing a common cable
whereby each system can
communicate directly with
another.
LAN address See DTC station
address.
LANIC See Local Area
Network Interface Controller.