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Glossary

interarea routing

Routing between two or more logical areas. Contrast

with: intra-area routing. See also: area.

interface configuration mode

Mode that allows you to configure a

Cisco router or switch port with specific information, such as an IP address
and mask.

interface processor

Any of several processor modules used with Cisco

7000 series routers. See also: AIP, CIP, EIP, FEIP, HIP, MIP, and TRIP.

Internet

The global "network of networks," whose popularity has

exploded in the last few years. Originally a tool for collaborative academic
research, it has become a medium for exchanging and distributing informa-
tion of all kinds. The Internet's need to link disparate computer platforms
and technologies has led to the development of uniform protocols and stan-
dards that have also found widespread use within corporate LANs. See also:
TCP/IP and MBONE.

internet

Before the rise of the Internet, this lowercase form was short-

hand for "internetwork" in the generic sense. Now rarely used. See also:
internetwork.

internet layer

Layer in the Internet Protocol suite of protocols that pro-

vide network addressing and routing through and internetwork.

Internet protocol

Any protocol belonging to the TCP/IP protocol stack.

See also: TCP/IP.

internetwork

Any group of private networks interconnected by routers

and other mechanisms, typically operating as a single entity.

internetworking

Broadly, anything associated with the general task of

linking networks to each other. The term encompasses technologies, proce-
dures, and products. When you connect networks to a router, you are
creating an internetwork.

intra-area routing

Routing that occurs within a logical area. Contrast

with: interarea routing.

Inverse ARP

Inverse Address Resolution Protocol: A technique by which

dynamic mappings are constructed in a network, allowing a device such
as a router to locate the logical network address and associate it with a

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