Cisco Cisco Access Registrar 3.5 - Manual (Page 75)

Glossary
GL-9
Cisco Access Registrar 3.5 Concepts and Reference Guide
OL-2683-02
VPN Virtual Private Network is a way for companies to use the Internet to securely transport private data.
VRF Virtual routing and forwarding. A per VPM routing table on the PE router. Each VPN instantiated on
that PE router has its own VRF.
X
X.25 A reliable public data network technology consisting of private virtual circuits, virtual calling, and
per-packet charging.
X.500 Defines the Directory Access Protocol (DAP) for clients to use when contacting directory servers. DAP
is a heavyweight protocol that runs over a full OSI stack and requires a significant amount of computing
resources to run.
V