CCNP ONT Official Exam Certification Guide

Chapter 3. Classification, Marking, and NBAR

<feature><title>This chapter covers the following subjects</title>

• Classification and Marking

• The DiffServ Model, Differentiated Services Code Point (DSCP), and Per-Hop Behavior (PHB)

• QoS Service Class

• Trust Boundaries

• Network Based Application Recognition (NBAR)

• Cisco IOS Commands to Configure NBAR

</feature>

Classification and marking are key IP QoS mechanisms used to implement the DiffServ QoS model. This chapter defines classification and marking and explains the markings that are available at the data link and network layers. This chapter also explains QoS service classes and how to use them to create a service policy throughout a network. It also defines network trust boundaries. Finally, it describes ...