Watchguard Firebox X1000 Reference Manual page 121

Reference Guide
armed
A state of a Firebox in which it is actively guarding against
intrusion and attack.
ARP
See Address Resolution Protocol.
ARP table
A table of active ARP addresses on a computer.
ascending
A method of ordering a group of items from lowest to highest,
such as from A to Z.
ASN.1 (Abstract Syntax Notation One)
ISO/IEC standard for encoding rules used in ANSI X.509
certificates. Two types exist: DER (Distinguished Encoding Rules)
and BER (Basic Encoding Rules).
asymmetric keys
A separate but integrated user key pair, composed of one public
key and one private key. Each key is one way, meaning that a key
used to encrypt information cannot be used to decrypt the same
data.
attack
An attempt to hack into a system. Because not all security issues
represent true attacks, most security vendors prefer the use of the
word "event" or "incident."
ATM (asynchronous transfer mode)
High-speed packet switching with dynamic bandwidth allocation.
authentication
A method of mapping a user name to a workstation IP address,
allowing the tracking of connections based on name rather than IP
address. With authentication, it does not matter which IP address
is used or from which machine a person chooses to work.
autopartitioning
A feature on some network devices that isolates a node within the
workgroup when the node becomes disabled, so as to not affect
the entire network or group.
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