Cisco PIX 520 - PIX Firewall 520 Online Help Manual page 6

A-D
AAA—Authentication, Authorization, and Accounting. See also TACACS+, RADIUS
Access Control, Access Control Rule, ACE—Information entered into the configuration which allows you to
specify what type of traffic to permit or deny into an the interface. By default, traffic that is not explicitly
permitted is denied.
ACL—Access Control List. A collection of Access Control Entries. An access list allows you to specify what
type of traffic to allow into an interface. By default, traffic that is not explicitly permitted is denied. See also Rule
ActiveX—A set of object-oriented programming technologies and tools used to create mobile or portable
programs. An ActiveX program is roughly equivalent to a Java applet.
Address Translation—The translation of a network address and/or port to another network address/or port.. See
also IP Address, NAT, PAT, Static PAT, Interface PAT.
A record address—"A" stands for address, and refers to name-to-address mapped records in DNS.
ARP—Address Resolution Protocol—A low-level TCP/IP protocol that maps a node's hardware address (called a
"MAC" address) to its IP address.
ASA—Adaptive Security Algorithm. Allows one-way (inside to outside) connections without an explicit
configuration for each internal system and application.
Cache—A temporary repository of information accumulated from previous task executions that can be reused,
decreasing the time required to perform the tasks.
CLI—Command Line Interface. The primary interface for entering configuration and monitoring commands to
the PIX Firewall. Refer to the Configuration Guide for the Cisco Secure PIX Firewall Version x.x for information
on what commands you can enter from the CLI.
Cookie—A cookie is a web browser feature which stores or retrieves information, such as a user's preferences, to
persistent storage. In Netscape and Internet Explorer, cookies are implemented by saving a small text file on your
local hard drive. The file can be loaded the next time you run a Java applet or visit a website. In this way
information unique to you as a user can be saved between sessions. The maximum size of a cookie is
approximately 4KB.
Client/server computing—Term used to describe distributed computing (processing) network systems in which
transaction responsibilities are divided into two parts: client (front end) and server (back end). Also called
distributed computing. See also RPC.