Cisco Systems AIRPWRINJ15002 A device that connects two otherwise incompatible networks together

Glossary

DFS	Dynamic Frequency Selection. In some regulatory domains, 5-GHz radios are
	required to use DFS to avoid interfering with radar signals.
DHCP	Dynamic host configuration protocol. A protocol available with many operating
	systems that automatically issues IP addresses within a specified range to
	devices on the network. The device retains the assigned address for a specific
	administrator-defined period.
domain name	The text name that refers to a grouping of networks or network resources based
	on organization-type or geography; for example: name.com—commercial;
	name.edu—educational; name.gov—government; ISPname.net—network
	provider (such as an ISP); name.ar—Argentina; name.au—Australia; and so on.

DNS

DSSS

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.

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 Mb/s, 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.

	Cisco Aironet 1550 Series Outdoor Mesh Access Point Hardware Installation Guide
OL-24247-01		GL-3