access layer In a network, a group of routers responsible for providing connectivity to external or remote sites. CPU-intensive functions, such as packet filtering, are implemented in the access layer of a network.

access rate The maximum speed, in bits per second, at which a network node may transmit or receive information over a physical link.

acknowledgment A packet or a frame used to indicate that information has been received.

active In EIGRP, a route is considered to be active state if a change in the topology has caused it not to have a successor available. During active processing, EIGRP attempts to find an alternative path to the target network.

AD (administrative distance) The relative weight assigned to each routing protocol ...

Get EIGRP for IP: Basic Operation and Configuration now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.