GLOSSARY 53

hub

A device that regenerates LAN traffic so that the transmission distance

 

of that signal can be extended. Hubs are similar to repeaters, in that

 

they connect LANs of the same type; however they connect more LANs

 

than a repeater and are generally more sophisticated.

IEEE

Institute of Electrical and Electronics Engineers. This American

 

organization was founded in 1963 and sets standards for computers

 

and communications.

IEEE 802.1D

A standard that defines the behavior of bridges in an Ethernet network.

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.

IPX

Internetwork Packet Exchange. IPX is a layer 3 and 4 network protocol

 

designed for networks that use Novell® Netware®.

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). LANs

 

are characterized by high transmission speeds over short distances (up

 

to 1000m).

line speed

See baud.

loop

An event that occurs when two network devices are connected by

 

more than one path, thereby causing packets to repeatedly cycle

 

around the network and not reach their destination.

MAC

Media Access Control. A protocol specified by the IEEE for determining

 

which devices have access to a network at any one time.

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3Com 1100 manual Hub, IP address, Line speed, Loop