**6.2.2 Wireless Local Area Network (WLAN)**

The WLAN technologies connect devices via a wireless distribution method (typically spread-spectrum or OFDM). Wi-Fi is a popular WLAN technology that provides high speed connection on short ranges. In recent years, because of the lack of more suitable metropolitan wireless networks, Wi-Fi has also been used at the metropolitan level. Wi-Fi networks are not suitable for moving devices and they take down in a few kilometers per hour movement. IEEE 802.11 is a set of standards that carry out Wi-Fi (Fourty et al., 2005; Shahraeini et al., 2010). These standards are as follows:

