
Node
A point of interconnection to a network.
Packet
An ordered group of data and control signals transmitted through
a network, as a subset of a larger message.
parameters
Parameters are often called arguments, and the two words are
used interchangeably. However, some computer languages such as
C define argument to mean actual parameter (i.e., the value), and
parameter to mean formal parameter. In RAD CLI, parameter
means formal parameter, not value.
Payload
The 48-byte segment of the ATM cell containing user data. Any
adaptation of user data via the AAL will take place within the
payload.
Physical Layer
Layer 1 of the OSI model. The layer concerned with electrical,
mechanical, and handshaking procedures over the interface
connecting a device to the transmission medium.
Port
The physical interface to a computer or multiplexer, for connection
of terminals and modems.
prompt
One or more characters in a command line interface to indicate
that the computer is ready to accept typed input.
Protocol
A formal set of conventions governing the formatting and relative
timing of message exchange between two communicating
systems.
QoS (Quality of Service)
Refers to the capability of a network to provide better service to
selected network traffic over various technologies, including Frame
Relay, Asynchronous Transfer Mode (ATM), Ethernet and 802.1
networks.
Router
An interconnection device that connects individual LANs. Unlike
bridges, which logically connect at OSI Layer 2, routers provide
logical paths at OSI Layer 3. Like bridges, remote sites can be
connected using routers over dedicated or switched lines to create
WANs.
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.
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