Home > Articles > Cisco QoS Exam Certification Guide: MQC, QPM, and AutoQoS

Cisco QoS Exam Certification Guide: MQC, QPM, and AutoQoS

Q&A

As mentioned in the Introduction, you have two choices for review questions. The following questions give you a more difficult challenge than the exam itself by using an open-ended question format. By reviewing now with this more difficult question format, you can exercise your memory better, and prove your conceptual and factual knowledge of this chapter. You can find the answers to these questions in Appendix A.

The second option for practice questions is to use the CD-ROM included with this book. It includes a testing engine and more than 200 multiple-choice questions. You should use this CD-ROM nearer to the end of your preparation for practice with the actual exam format:

  1. Configure two class maps, one that matches the packets permitted by ACL 101, and one that matches packets denied by ACL 101. Do not use class-default, and do not bother configuring a policy map.

  2. Configure a policy map that refers to predefined classes c1, C2, and c3, with the action for each class map being to set the DSCP value to AF11, AF21, and AF22, respectively. Assume that the class maps are already defined.

  3. List the three major configuration steps and the main command used in each step for the configuration of a QoS feature using MQC.

  4. Describe two different ways with which you could classify packets with DSCP AF31, AF32, and AF33 into a single class using MQC commands.

  5. List three benefits of MQC as compared with non-MQC-based QoS features.

  6. Consider the configuration snippet that follows. What commands would list statistics for the QoS policy implemented on fastethernet 0/0?

    class-map fred
     match dscp ef
    policy-map barney
     class fred
     set dscp af11
     class class-default
     set dscp be
    interface fastethernet0/0
     service-policy input barney
  7. List the two SNMP MIBs included in Cisco router IOS that can be used by QPM to improve the statistics presented to a QPM user. List the long version of the names and the acronyms.

  8. What information can be seen by using the CBQoSMIB that cannot be seen with show commands on the device being managed?

  9. How many classes can be associated with a single policy map in Cisco IOS Software Release 12.2(15)T?

  10. On a router using AutoQoS, what command enables the feature for Frame Relay VCs that use Frame Relay-to-ATM service interworking?

  11. On a router using AutoQoS, what command enables the feature on a serial interface when the router can trust the DSCP settings of incoming packets?

  12. Describe the classification configuration created by a router when enabling AutoQoS on a serial interface, with all default values chosen on the auto qos command.

  13. Describe the marking actions created by a router when enabling AutoQoS on a serial interface, with all default values chosen on the auto qos command.

  14. List three of the requirements on router AutoQoS that need to be true before actually configuring AutoQoS.

  15. List the data link protocols on a router that support AutoQoS.

  16. List the PHBs created by a router when the auto qos voip command is used on a PPP serial interface with the default bandwidth setting.

  17. List the PHBs created by a router when the auto qos voip command is used on a PPP serial interface with bandwidth 768 configured.

  18. List the PHBs created by a router when the auto qos voip command is used on a Frame Relay PVC with bandwidth 832 configured.

  19. When configuring AutoQoS on a router, with a Frame Relay interface, what configuration mode must you be in before using the auto qos command? What command gets you into that configuration mode?

  20. When configuring a 2950 switch with the auto qos voip trust command, what PHBs are configured on the interface?

  21. When configuring a 2950 switch with the auto qos voip cisco-phone command, what PHBs are configured on the interface?

  22. When configuring a 2950 switch with the auto qos voip cisco-phone command, what version of CDP is required in order for AutoQoS to work?

  23. When planning to use AutoQoS on a 2950 switch, what types of ports are generally configured with the trust option, and what type are generally configured with the cisco-phone option?

  24. When using AutoQoS on a 6500 running Cat-OS, describe the difference in using the ciscosoftphone setting and the trust dscp setting.

  25. When using AutoQoS on a 6500 running Cat-OS, describe when you might choose to use the ciscosoftphone option versus the trust dscp option.

  26. When using AutoQoS on a 6500 running Cat-OS, describe when you might choose to use the ciscoipphone setting versus the trust cos setting.

  27. When using AutoQoS on a 6500 running Cat-OS, the set port qos autoqos 3/1 voip ciscoipphone command has been configured. Describe what else must be true before AutoQoS will trust incoming CoS values for frames on port 3/1.

  28. Comparing the CLI of older QoS options in a Cisco router, MQC, and AutoQoS, which takes the least time to implement?

  29. Comparing the CLI of older QoS options in a Cisco router, MQC, and AutoQoS, which is considered to be the most modular?

  30. Comparing the CLI of older QoS options in a Cisco router, MQC, and AutoQoS, which is considered to be the most difficult to use?