This is the newer spectrum of wireless frequencies that is used by wireless devices including cordless phones, headsets, and networking products. Devices that rely on 2.4 GHz technology typically experience less interference than those that make use of other frequencies. This technology also supports much higher data transfer rates.
802.11 is a group of standards created by the Institute of Electrical and Electronics Engineers (IEEE) for Wireless Local Area Networks (WLANs). The version most common today is 802.11b—also known as Wireless Fidelity (Wi-Fi). It uses 2.4 GHz wireless signaling and provides up to 11 Mbps transmission.
This is the frequency band traditionally used in cordless telephones. It enables signals to penetrate walls and other physical barriers more easily than the lower frequencies that were used in earlier cordless phones.