Cisco Aironet 1550 Installation Manual page 161

Dynamic Frequency Selection. In some regulatory domains, 5-GHz radios are
DFS
required to use DFS to avoid interfering with radar signals.
Dynamic host configuration protocol. A protocol available with many operating
DHCP
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.
The text name that refers to a grouping of networks or network resources based
domain name
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.
Domain Name System server. A server that translates text names into IP
DNS
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
DSSS
that spreads its signal continuously over a wide frequency band.
E
Extensible Authentication Protocol. An optional IEEE 802.1x security feature
EAP
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
Ethernet
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
A repository for files so that a local area network can share files, mail, and
file server
programs.
Software that is programmed on a memory chip.
firmware
G
A device that connects two otherwise incompatible networks together.
gateway
Gigahertz. One billion cycles per second. A unit of measure for frequency.
GHz
OL-24247-01
Cisco Aironet 1550 Series Outdoor Mesh Access Point Hardware Installation Guide
Glossary
GL-3