Glossary
GL-2
Cisco Aironet 1200 Series Access Point Hardware Installation Guide
OL-8370-04
BPSK
A modulation technique used by IEEE 802.11b-compliant wireless LANs for
transmission at 1 Mbps.
broadcast packet
A single data message (packet) sent to all addresses on the same subnet.
C
CCK
Complementary code keying. A modulation technique used by IEEE
802.11b-compliant wireless LANs for transmission at 5.5 and 11 Mbps.
cell
The area of radio range or coverage in which the
wireless devices can
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.
client
A radio device that uses the services of an Access Point to communicate
wirelessly with other devices on a local area network.
CSMA
Carrier sense multiple access. A wireless LAN media access method specified
by the IEEE 802.11 specification.
D
data rates
The range of data transmission rates supported by a device. Data rates are
measured in megabits per second (Mbps).
dBi
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.
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.
dipole
A type of low-gain (2.2-dBi) antenna consisting of two (often internal) elements.
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
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.
