3com 2226 PLUS Owner's Manual download pdf (Page 88)

88 GLOSSARY

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 1000 metres).

Layer 2

Data Link layer in the ISO 7-Layer Data Communications

Protocol. This is related directly to the hardware

interface for the network devices and passes on traffic

based on MAC addresses.

Link Aggregation

See Trunking.

MAC

Media Access Control. A protocol specified by the IEEE

for determining which devices have access to a network

at any one time.

MAC Address

Media Access Control Address. Also called the

hardware, physical or Ethernet address. A layer 2

address associated with a particular network device.

Most devices that connect to a LAN have a MAC

address assigned to them as they are used to identify

other devices in a network. MAC addresses are 6 bytes

long.

Network

A Network is a collection of computers and other

computer equipment that are connected for the

purpose of exchanging information or sharing resources.

Networks vary in size, some are within a single room,

others span continents.

Ping

Packet Internet Groper. An Internet utility used to

determine whether a particular IP address is online. It is

used to test and debug a network by sending out a

packet and waiting for a response.

Protocol

A set of rules for communication between devices on a

network. The rules dictate format, timing, sequencing

and error control.

RJ-45

A standard connector used to connect Ethernet

networks. The "RJ" stands for "registered jack."

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3com 2226 PLUS Owner's Manual Page 88