Cisco Aironet 1240AG Series Hardware Installation Manual page 126

Glossary
Binary phase shift keying is a modulation technique used by IEEE
BPSK
802.11b-compliant wireless LANs for transmission at 1 Mbps.
A single data message (packet) sent to all addresses on the same subnet.
broadcast packet
C
Complementary Code Keying. A modulation technique used by IEEE
CCK
802.11b-compliant wireless LANs for transmission at 5.5 and 11 Mbps.
Cisco Centralized Key Management. Using CCKM, authenticated client devices
CCKM
can roam from one access point to another without any perceptible delay during
reassociation. An access point on your network provides wireless domain
services (WDS) and creates a cache of security credentials for CCKM-enabled
client devices on the subnet. The WDS access point's cache of credentials
dramatically reduces the time required for reassociation when a CCKM-enabled
client device roams to a new access point.
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.
Cisco Aironet 1240AG Series Access Point Hardware Installation Guide
GL-2
D r a f t 1 A - C I S C O C O N F I D E N T I A L
OL-7293-01