Cisco Cisco Access Registrar 3.5 - Manual (Page 72)

Glossary
GL-6
Cisco Access Registrar 3.5 Concepts and Reference Guide
OL-2683-02
RADIUS Dictionary The RADIUS dictionary passes information between a script and the RADIUS server, or between
scripts running on a single packet.
RADIUS Proxy In order to provide for the routing of RADIUS authentication and accounting requests, a RADIUS
proxy may be employed. To the NAS, the RADIUS proxy appears to act as a RADIUS server, whereas
to the RADIUS server the proxy appears to act as a RADIUS client.
RADIUS Server A server that is responsible for receiving user connection requests, authenticating the user, and then
returning all of the configuration information necessary for the client to deliver the service to the user.
RAS Remote Access Services. See RADIUS Client.
Remote DHCP
Server Usually a DHCP server in the service provider’s networks, however it might also be a DHCP server in
the customer’s VPN.
Remote Server A server that has been registered with the user interface, which can later be referenced as a proxy client
or as the method to perform a service; for example, a remote RADIUS server can be specified to act as
a proxy client.
REX RADIUS EXtension allows you to write C and C++ programs to affect the behavior of Cisco Access
Registrar.
Roaming The ability to connect to a NAS that is not your normal POP (Point of Presence) and have the
Access-Request redirected to your normal RADIUS server. The ability to use any one of multiple
Internet server providers, while maintaining a formal, customer-vendor relationship with only one.
Router A network device that connects multiple network segments and forwards packets from one network to
another. The router must determine how to forward a packet based on addresses, network traffic, and
cost.
Routing Tables A table that lists all of the possible paths data can take to get from a source to a destination. Depending
on how routers are configured, they may build their tables dynamically by trading information with
other routers, or they may be statically configured in advance.
RTT Round-Trip Time is the estimated round-trip time for an Acknowledgment to be received for a given
transmitted packet. When the network link is a local network, this delay will be minimal (if not zero).
When the network link is the Internet, this delay could be substantial and vary widely. RTT is adaptive;
it adjusts to include the PPD (Packet Processing Delay) and whatever shifting network delays
contribute to the time between a packet being transmitted and receiving its acknowledgment.
S
SAP Service Access Points (source and destination) identify protocols from which a packet has come and
to which a packet must be delivered.
Script Instructions that are run in the context of a RADIUS client/server session. Scripts can be specified for
servers, clients, vendors, and services. A script can be used as an incoming script, an outgoing script,
or both. Incoming scripts are executed during the Access-Request portion of a dial-in session. Outgoing
scripts are executed during the Access-Accept portion of a dial-in session. Scripts are referenced within
the User Interface by name. Scripts can be source code for a scripting language or a binary file.
R