IEEE 802.15
Shortwave radio transmission in a limited space or confined area. It is sometimes referred to as a personal area network. AD-HOC network which means, no defined structure and connections re spontaneous and often temporary. There is a limited range of applications for bluetooth, often simple peripherals like keyboards and mice.
IEEE 802.11 Sometimes referred to as wireless ethernet, it uses radio frequency transmission. Often centred on a wireless access point on an infrastructure network (not ad-hoc). The WAP communictes wirlessly with any end systems which are connected and has a wired connection on wards to the next network node.
MAN or WAN protocol 802.16
Designed to use PSTN to provide internet access, without need to lay underground cables etc..Local users connect to the antenna of a base station using a microwave signal.
Mobile phone is sometimes called a cellular phone because of the fundamental infrastructure operability. Each CELL (antenna) has a different operating frequency to adjacent cells. Connecting users connect to one of the CELLs to connect to the network.
PROGRESSION: