Psion Teklogix 9160 G2, User Manual, Page: 400 / 436

D -50 Psion Teklogix 9160 G2 Wireless Gateway User Manual
Appendix D: Glossary
AES
AES
The Advanced Encryption Standard (AES) is a symmetric 128-bit block data encryption
technique developed to replace DES encryption. AES works at multiple network layers
simultaneously.
Further information is available on the NIST Web site .
Atheros XR (Extended Range)
Atheros Extended Range (XR) is a proprietary method for implementing low rate traffic
over longer distances. It is meant to be transparent to XR enabled clients and access points
and is designed to interoperate with the 802.11 standard in 802.11g and 802.11a modes.
There is no support for Atheros XR in 802.11b, Atheros Turbo 5 GHz, or Atheros Dynamic
Turbo 5 GHz.
B
Basic Rate Set
The basic rate set defines the transmission rates that are mandatory for any station wanting
to join this wireless network. All stations must be able to receive data at the rates listed in
this set.
Beacon
Beacon frames provide the “heartbeat” of a WLAN , announcing the existence of the
network, and enabling stations to establish and maintain communications in an orderly
fashion. It carries the following information (some of which is optional):
• The Timestamp is used by stations to update their local clock, enabling synchronization
among all associated stations.
• The Beacon interval defines the amount of time between transmitting beacon frames.
Before entering power save mode, a station needs the beacon interval to know when to
wake up to receive the beacon.
• The Capability Information lists requirements of stations that want to join the WLAN .
For example, it indicates that all stations must use WEP .
• The Service Set Identifier ( SSID ).