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 ...