GL-25
Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
Glossary
public key
encryption
In public key encryption systems, every user has both a public key and a private
key. Each private key is maintained by a single user and shared with no one. The
private key is used to generate a unique digital signature and to decrypt
information encrypted with the public key. In contrast, a user’s public key is
available to everyone to encrypt information intended for that user, or to verify
that user’s digital signature. Sometimes called public key cryptography.
PVC permanent virtual circuit (or connection). Virtual circuit that is permanently
established. PVCs save bandwidth associated with circuit establishment and tear
down in situations where certain virtual circuits must exist all the time. In ATM
terminology, called a permanent virtual connection.
Q
QoS Quality of Service. A method of guaranteeing bandwidth to specified types of
traffic.
quick mode In Oakley, the name of the mechanism used after a security association has been
established to negotiate changes in security services, such a s new keys.
R
RA registration authority. An entity serving as an optional component in PKI
systems to record or verify some of the information that certification authorities
(CAs) use when issuing certificates or performing other certificate manageme nt
functions. The CA itself might perform all RA functions, but they are generally
kept separate. RA duties vary considerably, but may include assigning
distinguished names, distributing tokens, and performing personal
authentication functions.
RADIUS Remote Authentication Dial-In User Service. An access server authentication and
accounting protocol that uses UDP as the transport protocol. See also TACACS+
RCP remote copy protocol. Protocol that allows users to copy files to and from a file
system residing on a remote host or server on the network. The rcp protocol uses
TCP to ensure the reliable delivery of data