Glossary
ACE
An Access Control Entry outlines the permissions associated with a particular ACE ID. There are three
ACE frame types (Ethernet Type, ARP, and IPv4) and two ACE actions (permit and deny). The ACE also
contains many parameter options that are available for individual application.
ACL
An Access Control List is a mechanism for filtering packets at the hardware level. Packets can be
classified by characteristics such as the source or destination MAC, IP address, IP type, or
queue. Once classified, the packets can be forwarded, counted, queued, or dropped.
ad-hoc mode
An 802.11 networking framework in which devices or stations communicate directly with each other,
without the use of an AP.
AP
In wireless technology, Access Points are LAN transceivers or "base stations" that can connect to the
regular wired network and forward and receive the radio signals that transmit wireless data.
ARP
Address Resolution Protocol is part of the TCP/IP suite used to dynamically associate a device's physical
address (MAC address) with its logical address (IP address). The system broadcasts an ARP request,
containing the IP address, and the device with that IP address sends back its MAC address so that traffic
can be transmitted.
AS
OSPF (Open Shortest Path First)
, an Autonomous System is a connected segment of a network
topology that consists of a collection of subnetworks (with hosts attached) interconnected by a set of
routes. The subnetworks and the routers are expected to be under the control of a single administration.
Within an AS, routers may use one or more interior routing protocols and sometimes several sets of
metrics. An AS is expected to present to other autonomous systems an appearance of a coherent
interior routing plan and a consistent picture of the destinations reachable through the AS. An AS is
identified by a unique 16-bit number.
ATM
Asynchronous Transmission Mode is a start/stop transmission in which each character is preceded by a
start signal and followed by one or more stop signals. A variable time interval can exist between
characters. ATM is the preferred technology for the transfer of images.
backbone area
OSPF (Open Shortest Path First)
, a network that has more than one area must have a backbone area,
configured as 0.0.0.0. All areas in an
must connect to the backbone area.
BGP
Border Gateway Protocol is a router protocol in the IP suite designed to exchange network reachability
information with BGP systems in other autonomous systems. You use a fully meshed configuration with
BGP.
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