Cisco 1242AG - Aironet - Wireless Access Point Hardware Installation Manual page 118

Glossary
B
A wireless LAN packet that signals the availability and presence of the wireless
beacon
device. Beacon packets are sent by access points and base stations; however,
client radio cards send beacons when operating in computer to computer (Ad
Hoc) mode.
Boot Protocol. A protocol used for the static assignment of IP addresses to
BOOTP
devices on the network.
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.
CCKM Cisco Centralized Key Management. Using CCKM, authenticated client devices
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 Frequency Selection. In some regulatory domains, 5-GHz radios are
DFS
required to use DFS to avoid interfering with radar signals.
Cisco Aironet 1240AG Series Access Point Hardware Installation Guide
GL-2
OL-8371-05