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Glossary

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and, using CSMA/CD, operates over various types of cables at 10Mbps. Also
called: DIX (Digital/Intel/Xerox) Ethernet. See also: 10BaseT, Fast Ethernet,
and IEEE.

EtherTalk

A data-link product from Apple Computer that permits

AppleTalk networks to be connected by Ethernet.

excess burst size

The amount of traffic by which the user may exceed the

committed burst size.

excess rate

In ATM networking, traffic exceeding a connection's insured

rate. The excess rate is the maximum rate less the insured rate. Depending on
the availability of network resources, excess traffic can be discarded during
congestion episodes. Compare with: maximum rate.

EXEC session

Cisco term used to describe the command-line interface.

The EXEC session exists in user mode and privileged mode.

expansion

The procedure of directing compressed data through an algo-

rithm, restoring information to its original size.

expedited delivery

An option that can be specified by one protocol layer,

communicating either with other layers or with the identical protocol layer in
a different network device, requiring that identified data be processed faster.

explorer frame

Used with Source Route Bridging to find the route to the

remote bridged network before a frame is transmitted.

explorer packet

An SNA packet transmitted by a source Token Ring

device to find the path through a source-route-bridged network.

extended IP access list

IP access list that filters the network by logical

address, protocol field in the Network layer header, and even the port field
in the Transport layer header.

extended IPX access list

IPX access list that filters the network by logical

IPX address, protocol field in the Network layer header, or even socket
number in the Transport layer header.

Extended Setup

Used in setup mode to configure the router with more

detail than Basic Setup mode. Allows multiple-protocol support and inter-
face configuration.

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