Cisco AIR-AP1121G-E-K9 Hardware Installation Manual page 114

Glossary
C
Complementary code keying. A modulation technique used by IEEE
CCK
802.11b-compliant wireless LANs for transmission at 5.5 and 11 Mbps.
The area of radio range or coverage in which the wireless devices can
cell
communicate with the base station. The size of the cell depends upon the speed
of the transmission, the type of antenna used, and the physical environment, as
well as other factors.
A radio device that uses the services of an Access Point to communicate
client
wirelessly with other devices on a local area network.
Carrier sense multiple access. A wireless LAN media access method specified
CSMA
by the IEEE 802.11 specification.
D
The range of data transmission rates supported by a device. Data rates are
data rates
measured in megabits per second (Mbps).
A ratio of decibels to an isotropic antenna that is commonly used to measure
dBi
antenna gain. The greater the dBi value, the higher the gain, and the more acute
the angle of coverage.
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.
A type of low-gain (2.2-dBi) antenna consisting of two (often internal) elements.
dipole
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.
Cisco Aironet 1100 Series Access Point Hardware Installation Guide
GL-2
OL-4309-02