Wi-Fi Protocols
802.11a
-> This version operates at 54 Mbps. It is considered as the favorite
wireless LAN protocol for IP telephony. The
problem with it is distance; beyond
100 feet, you are out of the network.
802.11b
-> This version operates at 11 Mbps, but the distance of transmission is 300
feet, which is a considerable
improvement over its predecessor. This version is
used for public hotspots and small campus environments.
802.11g
-> This version is relatively new and is considered as a high-speed
replacement for 802.11b. It works at 54 Mbps
WiMAX Protocols
802.16
-> IEEE 802.16 is a specification for fixed broadband wireless metropolitan
access networks (MANs) that use a
point-to-point architecture. The standard
defines the use of bandwidth between the licensed 10 GHz and 66
GHz and between
the 2 GHz and 11 GHz (licensed and unlicensed) frequency ranges and defines MAC
layer that
supports multiple physical layer specifications customized for the
frequency band of use and their associated
regulations.