Cisco Systems 2.5 , Symbols and Numerics, A

GL-1
Cisco Router and Security Device Manager 2.5 User’s Guide
OL-4015-12
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.
802.1x 802.1x is an IEEE standard for media-level access control, offering the
capability to permit or deny network connectivity, control VLAN access and
apply traffic policy, based on user or machine identity.
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. An entry in an ACL that specifies a source host or network
and whether or not traffic from that host is permitted or denied. An ACE can also
specify a destination host or network, and the type of traffic.