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Glossary
D
Data Rates
dBi
dBm
DHCP
Dipole
Domain Name
DNS
DSSS
E
EAP
Ethernet
F
File Server
Firmware
Cisco Aironet 1400 Series Wireless Bridge Hardware Installation Guide
GL-2
D R A F T - C I S C O C O N F I D E N T I A L
The range of data transmission rates supported by a device. Data rates are measured in megabits
per second (Mbps).
A ratio of decibels to an isotropic antenna that is commonly used to measure antenna gain. The
greater the dBi value, the higher the gain, and the more acute the angle of coverage.
A power measurement described in decibels per milliwatt. 0 dBm is defined as 1 mw at 1 kHz of
frequency at 600 ohms of impedance.
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.
A type of low-gain (2.2-dBi) antenna consisting of two (often internal) elements.
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.
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.
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.
A repository for files so that a local area network can share files, mail, and programs.
Software that is programmed on a memory chip.
OL-4072-01
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