Appendix D: Glossary

Appendix C: Glossary

The Glossary 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 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 the higher

 

levels.

IP

Internet Protocol – The TCP/IP standard protocol defines the IP

 

datagram as the 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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Micon IP-220E manual Appendix C Glossary, Term Definition