WiFi is so common it has become almost invisible in industrial and commercial settings. There are WiFi networks everywhere. When most people think of wireless in the industrial environment, they think of wireless sensor networks. While that’s one segment of the use of wireless, it isn’t the only one, and it is by far the smallest. Notwithstanding all the hoopla around wireless field device standards like Zigbee and Wireless HART, the real workhorse for wireless in the industrial space is IEEE 802.11 or WiFi.