Installation guide

Glossary
D-2
cache: A location where information is stored that can be accessed
quickly. This location can be in memory or in a file.
CD: Compact disc
CIDR: Classless InterDomain Routing – a method of specifying net-
works and sub networks (subnets) that allows grouping and
results in less router overhead.
client: A computer that requests services from another (server).
cluster: A logical grouping of Enforcement servers.
compliance: Meets defined standards or conditions.
CTA: Cisco Trust Agent
Enforcement: cluster: A logical grouping of Enforcement servers.
Enforcement: server: When using NAC 800 in a multiple-server installation, the
server that is used for enforcement.
ES: Enforcement server
DC: Domain controller – A server that manages and controls the
activities (such as user access) in the domain.
DHCP: Dynamic Host Configuration Protocol – A method of assigning
IP addresses to endpoints as they connect to the network, and
releasing them as the endpoints disconnect from the network.
DHCP allows administrators to manage IP addresses from one
location rather than at each endpoint.
DN: Distinguished Name – In the Lightweight Directory Access
Protocol (LDAP), objects are referenced by their DN.
DNS: Domain name server – A computer that translates domain
names (such as mycompany.com) into IP addresses (such as
216.239.41.99).