IEEE 802.11g, a relatively new standard, operates at a bit rate up to 54 Mbps, but uses the S-Band ISM and OFDM.

A personal computer equipped with a wireless LAN network adapter is known as a wireless client.

Wireless clients can communicate directly with each other or through a wireless access point. A Windows wireless client is a wireless client that has a wireless network adapter and driver installed and is running Windows Vista™, Windows XP, Windows Server Code Name “Longhorn,” or Windows Server 2003.

Existing 802.11b wireless network adapters cannot be upgraded to 802.11g by updating the firmware of the adapter and must be replaced.

Unlike migrating from 802.11b to 802.11a (in which all the network adapters in both the wireless clients and the wireless APs must be replaced at the same time), migrating from 802.11b to 802.11g can be done incrementally.

The original bit rates for IEEE 802.11 were 2 and 1 megabits per second (Mbps) using the S-Band 2.4-2.5 gigahertz (GHz) Industrial, Scientific, and Medical (ISM) frequency band.

The maximum bit rate for IEEE 802.11b is 11 Mbps (using DSSS).At the MAC sublayer, IEEE 802.11 uses the carrier sense multiple access with collision avoidance (CSMA/CA) media access control (MAC) protocol, which works in the following way: The CSMA/CA scheme does not ensure that a collision never takes place and it is difficult for a transmitting node to detect that a collision is occurring.Additionally, depending on the placement of the wireless AP and the wireless clients, a radio frequency (RF) barrier can prevent a wireless client from sensing that another wireless node is transmitting. To provide better detection of collisions and a solution to the hidden station problem, IEEE 802.11 also defines the use of an acknowledgment (ACK) frame to indicate that a wireless frame was successfully received and the use of Request to Send (RTS) and Clear to Send (CTS) messages.802.11g wireless network adapters can connect to an 802.11b wireless AP, and 802.11b wireless network adapters can connect to an 802.11g wireless AP.Thus, 802.11g provides a migration path for 802.11b networks to a frequency-compatible standard technology with a higher bit rate.IEEE 802.11 is an industry standard for a shared access, wireless local area network (WLAN) that defines the Physical layer and media access control (MAC) sublayer for wireless communications.