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Appendix D: Glossary
The Glossary section defines the terms used in this User Manual
Term Definition
Ethernet Local Area Network technology, originally developed by Xerox Corporation,
can link up to 1,024 nodes in a bus network. Ethernet provides raw data
transfer in a rate of 10 megabits/sec. with actual throughputs in 2 to 3
megabits/sec. using a baseband (single-channel) communication technique.
Ethernet uses carrier sense multiple access collision detection (CSMA/CD)
that prevents network failures when two devices attempt to access the
network at the same time.
LAN hardware manufacturers use Ethernet
protocol; their products may always not be compatible.
Gateway A computer that attaches to a number of networks and routes packets
between them. The packets can be different protocols at higher levels.
IP Internet Protocol – The TCP/IP standard protocol defines the IP datagram as a
unit of information passed across a network.
IP
Address Internet Protocol Address – A 32-bit address assigned to hosts participating in
a TCP/IP network.
The IP address consists of network and host portions.
It is assigned to an interconnection of a host to a physical network.
MAC Medium Access Control - The network layer between the physical and the
data link layers. Specifically, the physical (hardware) address exists in this
layer.
MIB Management Information Base – The database, i.e. set of variables
maintained by a gateway running SNMP
NMS Network Management Station
OID Object Identifier – The variables defined in a MIB
Router A computer that manages traffic between different network segments or
different network topologies. It directs the destination IP address. The
network media can be different, but the higher-level protocols must be the
same.
SNMP Simple Network Management Protocol – A standard protocol used to monitor
IP hosts, networks, and gateways. SNMP defines a set of simple
operations that can be performed on the OIDs of the MIBs managed by the
monitored Agents. It employs the UDP/IP transport layer to move its object
between the Agents and the NMS
TCP/IP Transmission Control Protocol/ Internet Protocol – A protocol suite used by
more than 15 million users with a UNIX association and widely used to link
computers of different kinds.
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