Cisco Access Registrar 3.5 Reference Manual page 70

Glossary
M
Management Information Base—Database of network management information used and maintained
MIB
by a network management protocol such as SNMP. The value of a MIB object can be changed or
retrieved using SNMP commands. MIB objects are organized in a tree structure that includes public
and private branches.
Multi-Protocol Label Switching—
MPLS
MPLS-based Virtual Private Networks
MPLS VPN
Multiple System Operators are typically cable companies that provide Internet access for regional
MSO
independent operators.
N
Network Access Server is a device providing temporary, on-demand network access to users. This
NAS
access is point-to-point using PSTN or ISDN lines. A NAS operates as a client of RADIUS. The client
is responsible for passing user information to designated RADIUS servers.
In PPTP terminology, this is referred to as the PPTP Access Concentrator (PAC). In L2TP terminology,
the NAS is referred to as the L2TP Access Concentrator (LAC).
Network Control Protocol is responsible for negotiating the protocol-specific particulars of the
NCP
point-to-point protocol (PPP) link.
In order to provide for the routing of RADIUS authentication and accounting requests, the UserID field
Network Access
Identifier used in PPP and in the subsequent RADIUS authentication and accounting requests, known as the
Network Access Identifier (NAI), may contain structure. This structure provides a means by which the
RADIUS proxy locates the RADIUS server that is to receive the request. This same structure may also
be used to locate the tunnel end point when domain-based tunneling is used.
O
Open Database Connectivity—a standard set of application programming interface (API) function calls
ODBC
(supported by Microsoft and in general use) that can be used to access data store in both relational and
non-relational database management systems (DBMSs).
Processes ODBC function calls, submits SQL requests to specific data source, and returns results to
ODBC Driver
applications. ODBC drivers for specific types of data files, including database files, spreadsheet files,
and text fields, are available from Microsoft Corporation.
Cisco Access Registrar 3.5 Concepts and Reference Guide
GL-4
OL-2683-02