Glossary

DNS

Domain Name System server. A server that translates text names into IP

 

addresses. The server maintains a database of host alphanumeric names and their

 

corresponding IP addresses.

DSSS

Direct sequence spread spectrum. A type of spread spectrum radio transmission

 

that spreads its signal continuously over a wide frequency band.

E

EAP

Ethernet

Extensible Authentication Protocol. An optional IEEE 802.1x security feature ideal for organizations with a large user base and access to an EAP-enabled Remote Authentication Dial-In User Service (RADIUS) server.

The most widely used wired local area network. Ethernet uses carrier sense multiple access (CSMA) to allow computers to share a network and operates at 10, 100, or 1000 Mbps, depending on the physical layer used.

F

file server

firmware

A repository for files so that a local area network can share files, mail, and programs.

Software that is programmed on a memory chip.

G

gateway

A device that connects two otherwise incompatible networks together.

GHz

Gigahertz. One billion cycles per second. A unit of measure for frequency.

I

IEEE

Institute of Electrical and Electronic Engineers. A professional society serving

 

 

electrical engineers through its publications, conferences, and standards

 

 

development activities. The body responsible for the Ethernet 802.3 and wireless

 

 

LAN 802.11 specifications.

infrastructure

The wired Ethernet network.

IP address

The Internet Protocol (IP) address of a station.

IP subnet mask

The number used to identify the IP subnetwork, indicating whether the IP

 

 

address can be recognized on the LAN or if it must be reached through a

 

 

gateway. This number is expressed in a form similar to an IP address; for

 

 

example: 255.255.255.0.

isotropic

An antenna that radiates its signal in a spherical pattern.

 

 

Cisco Wireless ISR and HWIC Access Point Configuration Guide

 

 

 

 

 

 

 

 

 

 

 

 

 

OL-6415-04

 

 

GL-3

 

 

 

 

 

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Cisco Systems OL-6415-04 manual Corresponding IP addresses, LAN 802.11 specifications, Wired Ethernet network