Summary:To earn your CCNP certification, you've got to know how the different QoS service types operate.  Learn the basics from Chris Bryant, CCIE #12933. Keywords:cisco, ccnp, certification, exam, bcmsn, quality, of, service, diffserv, differentiated, services Article Body:To pass the CCNP exams, you’ve got to master Quality of Service, and the first step in doing so is knowing the...