When most people think of networking these days, Wi-Fi is often the first thing to spring to mind. Like Bluetooth, the concept of wireless, always-on connectivity definitely carries the "cool" factor. So what actually lies under the wireless hood?

Wi-Fi is essentially wireless LAN technology, as defined by the various IEEE 802.11 standards. It was first defined in 1997, but a lack of standardisation effectively prevented any widespread implementation of the technology. There are quite a few ratified standards, all amendments to the legacy standard, but by far the most popular and widely-used are 802.11a, 802.11b and 802.11g. The newest standard is 802.11n, but this has yet to the ratified.

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