Specifications

RADIUS (Remote
Authentication Dial-In
User Service)
An authentication, authorization and accounting protocol for
applications such as network access or IP mobility. Many network
services require the presentation of security credentials (such as a
username and password or security certificate) in order to connect
to the network. Before access to the network is granted, this
information is passed to a network access server (NAS) device
over the link-layer protocol, then to a RADIUS server over the
RADIUS protocol. The RADIUS server checks that the information is
correct using authentication schemes like PAP, CHAP or EAP.
Routing
The process of selecting the most efficient circuit path for a
message.
Serial Transmission
A common mode of transmission, where the character bits are
sent sequentially one at a time instead of in parallel.
Single Mode
Describing an optical wave-guide or fiber that is designed to
propagate light of only a single wavelength (typically 5-10 microns
in diameter).
Space
In telecommunications, the absence of a signal. Equivalent to a
binary 0.
Sync
See Synchronous Transmission.
Synchronous
Transmission
Transmission in which data bits are sent at a fixed rate, with the
transmitter and receiver synchronized.
T1
A digital transmission link with a capacity of 1.544 Mbps used in
North America. Typically channelized into 24 DS0s, each capable of
carrying a single voice conversation or data stream. Uses two pairs
of twisted pair wires.
Telnet
The virtual terminal protocol in the Internet suite of protocols. It
lets users on one host access another host and work as terminal
users of that remote host. Instead of dialing into the computer,
the user connects to it over the Internet using Telnet. When
issuing a Telnet session, it connects to the Telnet host and logs in.
The connection enables the user to work with the remote machine
as though a terminal was connected to it.