GL-1
Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08

GLOSSARY

Symbols and Numerics
3DES Triple DES. An encryption algorithm that uses three 56-bit DES encryption keys
(effectively 168 bits) in quick succession. An alternative 3DES version uses just
two 56-bit DES keys, but uses one of them twice, resulting effectively in a
112-bit key length. Legal for use only in the United States. See DES.
A
AAA authentication, authorization, and accounting. Pronounced “triple-A.”
AAL5-SNAP ATM Adaptation Layer 5 Subnetwork Access Protocol.
AAL5-MUX ATM Adaptation Layer 5 Multiplexing.
access control,
access control rule
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. Access control rules are composed of access
control entries (ACEs).
ACE access control entry.
ACL access control list. A mechanism on a device that specifies which entities are
permitted to access that device or the networks behind that device.
ACS Cisco Secure Access Control Server. Software running on a RADIUS server
used to store policy databases used in a NAC implementation to control access
to the network.