Glossary
B
beacon | A wireless LAN packet that signals the availability and presence of the wireless |
| 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. |
BOOTP
BPSK
Boot Protocol. A protocol used for the static assignment of IP addresses to devices on the network.
Binary phase shift keying is a modulation technique used by IEEE
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 |
| |
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 |
| client devices on the subnet. The WDS access point's cache of credentials |
| dramatically reduces the time required for reassociation when a |
| client device roams to a new access point. |
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. | |
DFS | Dynamic Frequency Selection. In some regulatory domains, | |||
|
|
| required to use DFS to avoid interfering with radar signals. | |
|
|
| Cisco Aironet 1240AG Series Access Point Hardware Installation Guide | |
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
| ||
