GS748T Smart Switch Hardware Installation Guide

Table C-1. Glossary

Ethernet

A LAN specification developed jointly by Xerox, Intel and Digital Equipment

 

Corporation. Ethernet networks transmit packets at a rate of 10 Mbps.

Fast Ethernet

An Ethernet system that is designed to operate at 100 Mbps.

Gigabit Ethernet

An Ethernet system that is designed to operate at 1000 Mbps (1 Gbps).

Fault isolation

A technique for identifying and alerting administrators about connections

 

(such as those associated with switch ports) that are experiencing

 

congestion or failure, or exceeding an administrator-defined threshold.

Forwarding

The process of sending a packet toward its destination using a networking

 

device.

Filtering

The process of screening a packet for certain characteristics, such as

 

source address, destination address, or protocol. Filtering is used to

 

determine whether traffic is to be forwarded, and can also prevent

 

unauthorized access to a network or network devices.

Flow control

A congestion- control mechanism. Congestion is caused by devices

 

sending traffic to already overloaded port on a switch. Flow control prevents

 

packet loss and temporarily inhibits devices from generating more traffic

 

until the period of congestion ends.

Full-duplex

A system that allows packets to be transmitted and received at the same

 

time and, in effect, doubles the potential throughput of a link.

Half-duplex

A system that allows packets to transmitted and received, but not at the

 

same time. Contrast with full duplex.

IEEE

Institute of Electrical and Electronics Engineers. This American organization

 

was founded in 1963 and sets standards for computers and

 

communications.

IETF

Internet Engineering Task Force. An organization responsible for providing

 

engineering solutions for TCP/IP networks. In the network management

 

area, this group is responsible for the development of the SNMP protocol.

IP

Internet Protocol. IP is a layer 3 network protocol that is the standard for

 

sending data through a network. IP is part of the TCP/IP set of protocols

 

that describe the routing of packets to addressed devices.

IP address

Internet Protocol address. A unique identifier for a device attached to a

 

network using TCP/IP. The address is written as four octets separated with

 

periods (full-stops), and is made up of a network section, an optional subnet

 

section and a host section.

LAN

Local Area Network. A network of endstations (such as PCs, printers,

 

servers) and network devices (hubs and switches) that cover a relatively

 

small geographic area (usually not larger than a floor or building).

C-2

Glossary

v1.0, January 2007

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