I've had some people suggest that I should post more of my study notes. QoS is one of those black magic topics that I really do need to understand more of. I went through with one of my co-workers who gave me the Catalyst 3750 QoS in 30 lecture. Between that and some of Jerome Henry's QoS videos on youtube, here the basics on QoS. So here are my notes in all their ugly glory.