ACA: Australian Communications Authority, the body responsible for regulating telecommunications within Australia. Access Point: wireless "base station" which coordinates communication for wireless clients between each other and with the wired network. Class-licence: a licensing regime under which an individual licence is not required for each transmitter provided that the equipment meets certain requirements such as maximum power. ("Class licence" is ACA jargon for "unlicensed band") Client Adapter: wireless network interface card which is inserted into each user's PC to enable participation in a wireless LAN. IEEE802.11b: widely adopted standard governing access points and client adapters and the protocols for wireless communication at rates up to 11 Mbit/s. IEEE802.11g: widely adopted standard governing access points and client adapters and the protocols for wireless communication at rates up to 54 Mbit/s. ITS: Information Technology Services Division of Monash University. Spread Spectrum: A wireless encoding and modulation scheme which spreads the transmitted signal over a relatively large frequency bandwidth. The aim is to make the transmission less susceptible to interference from narrow bandwidth noise sources. Spread spectrum systems can operate at low signal to noise ratios, hence low radiated power levels. Wired Equivalent Privacy (WEP): Security Mechanism defined within IEEE802.11 standard and implemented as an optional feature. WEP was intended to make the link integrity of the wireless medium equivalent to that of a cable, but it has been shown to be deeply flawed. Wireless LAN (WLAN): One or more Access Points and their associated clients which communicate by radio to form a data network. A wireless client is able to roam freely within the range of its Wireless LAN. The useful range of a single access point depends on the building structure, but is typically about 50 metres. | 
