Dive into the second part of Quality of Service (QoS) in this comprehensive 42-minute video from the free CCNA 200-301 course. Learn about classification methods, including PCP/CoS, IP ToS byte, IP Precedence, and DSCP. Explore DF/EF, AF classes, and CS markings, as well as RFC 4594 recommendations. Understand trust boundaries, queuing/congestion management techniques, and the differences between shaping and policing. Test your knowledge with five quizzes and get information on Boson ExSim for additional practice.