20/80 rule

Network traffic pattern where 20 percent of traffic stays in a local area, while 80 percent travels to or from a remote resource.


A method of passing frames and their VLAN associations over a trunk link, based on the IEEE 802.1Q standard.


Authentication, authorization, and accounting services used to control user access to a switch or a switch port.

access layer

The layer of the network where end users are connected.

active virtual forwarder (AVF)

A GLBP router that takes on a virtual MAC address and forwards traffic received on that address.

active virtual gateway (AVG)

The GLBP router that answers all ARP requests for the virtual router address and assigns virtual MAC addresses to each router in the GLBP group. ...

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