Cisco CB21AG Installation And Configuration Manual page 264

Glossary
B
Specifies the amount of the frequency spectrum that is usable for data transfer. It identifies the
bandwidth
maximum data rate that a signal can attain on the medium without encountering significant power loss.
Binary phase shift keying. A modulation technique used by IEEE 802.11-compliant wireless LANs for
BPSK
transmission at 1 Mbps.
A security feature for use with dynamic WEP keys. If your client adapter uses LEAP, EAP-FAST,
broadcast key
rotation EAP-TLS, or PEAP authentication and you enable this feature, the access point changes the dynamic
broadcast WEP key that it provides at the interval you select.
C
Complementary code keying. A modulation technique used by IEEE 802.11b-compliant wireless LANs
CCK
for transmission at 5.5 and 11 Mbps.
Cisco Centralized Key Management. Using CCKM, authenticated client devices can roam from one
CCKM
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.
Cisco Key Integrity Protocol. Cisco's WEP key permutation technique based on an early algorithm
CKIP
presented by the IEEE 802.11i security task group.
A radio device that uses the services of an access point to communicate wirelessly with other devices
client
on a local area network.
Carrier sense multiple access. A wireless LAN media access method specified by the IEEE 802.11
CSMA
specification.
Cyclic redundancy check. A method of checking for errors in a received packet.
CRC
D
The range of data transmission rates supported by a device. Data rates are measured in megabits per
data rates
second (Mbps).
A ratio of decibels to an isotropic antenna that is commonly used to measure antenna gain. The greater
dBi
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 systems that
DHCP
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.
Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide
GL-2
OL-4211-03