Quality of Service is a complex and often misunderstood topic, more so when it comes to wireless networks, as wireless and radio technologies are often misunderstood in general. Combining the two (that is QoS & 802.11 Wi-Fi) gives us a good place to start with the first post on this site. As this could be a lengthy write-up we will break it up into a number of posts, let’s begin with a bit of history and understanding what goes on when packets are transmitted over the air.