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An networking device that seamlessly connects wired and wireless networks. 

Access Points combined with a distributed system support the creation of multiple 

radio cells that enable roaming throughout a facility.

A wireless network composed solely of stations within mutual communication 

range of each other (no Access Point).

AES is the U.S. government’s next-generation cryptography algorithm, which will 

replace DES and 3DES. This encryption key protocol is applied in 802.1i standard 

to improve WLAN security. AES will require new hardware, in contrast with TKIP 

that can be used on existing wireless devices.

A set of stations controlled by a single coordination function.

A type of data transmission in which a single medium (such as cable) carries 

several channels of data at once.

An instance of medium use for the purpose of passing protocol data units that 

may be used simultaneously, in the same volume of space, with other instances 

of medium use (on other channels) by other instances of the same physical layer, 

with an acceptably low frame error ratio due to mutual interference.

A client is the desktop or mobile PC that is connected to your network.

Signal power alone is not enough to maintain 802.11b-like distances in an 

802.11a/g environment. To compensate, a new physical-layer encoding technology 

was designed that departs from the traditional direct-sequence technology being 

deployed today. This technology is called COFDM (coded OFDM). COFDM was 

developed specifically for indoor wireless use and offers performance much 

superior to that of spread-spectrum solutions. COFDM works by breaking one 

high-speed data carrier into several lower-speed subcarriers, which are then 

transmitted in parallel. Each high-speed carrier is 20 MHz wide and is broken 

up into 52 subchannels, each approximately 300 KHz wide. COFDM uses 48 of 

these subchannels for data, while the remaining four are used for error correction. 

COFDM delivers higher data rates and a high degree of multipath reflection 

recovery, thanks to its encoding scheme and error correction.

Each subchannel in the COFDM implementation is about 300 KHz wide. At the low