Qa

As mentioned in the Introduction, you have two choices for review questions. The questions that follow next 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. You can even customize the CD-ROM exam to include, or not include, the topics that are only on the CCIP QoS.

1 Describe the difference between classification and marking.

2 Describe, in general, how a queuing feature could take advantage of the work performed by a classification and marking feature.

3 Characterize what must be true before the CoS field may be useful for marking packets.

4 Most other QoS tools, besides classification and marking tools, also have a classification feature. Describe the advantage of classification, in terms of overall QoS design and policies, and explain why classification and marking is useful, in spite of the fact that other tools also classify the traffic.

5 Which of the following classification and marking tools can classify based on the contents of an HTTP URL: class-based marking (CB marking), policy-based routing (PBR), committed access rate (CAR), network-based application recognition (NBAR), or dial peers?

6 Describe the differences between IP extended ACLs as compared with NBAR for matching TCP and UDP port numbers.

7 Which of the following classification and marking tools can classify based on the outgoing interface of the route used for a packet: class-based marking (CB marking), policy-based routing (PBR), committed access rate (CAR), network-based application recognition (NBAR), or dial peers?

8 Which of the following classification and marking tools can classify based on the destination TCP port number of a packet, without using an IP ACL: class-based marking (CB marking), policy-based routing (PBR), committed access rate (CAR), network-based application recognition (NBAR), or dial peers?

9 Which of the following classification and marking tools can classify based on the DSCP, without using an IP ACL: class-based marking (CB marking), policy-based routing (PBR), committed access rate (CAR), network-based application recognition (NBAR), or dial peers?

10 Which of the following classification and marking tools can classify based on either the source or destination MAC address: class-based marking (CB marking), policy-based routing (PBR), committed access rate (CAR), network-based application recognition (NBAR), or dial peers?

11 Which of the following classification and marking tools can classify based on the even numbered UDP ports used for RTP traffic, with or without using an IP ACL: class-based marking (CB marking), policy-based routing (PBR), committed access rate (CAR), network-based application recognition (NBAR), or dial-peers?

12 Which of the following QoS marking fields are carried inside an 802.1Q header: QoS, CoS, DE, ToS byte, User Priority, ToS bits, CLP, Precedence, QoS Group, DSCP, MPLS Experimental, or DS?

13 Which of the following QoS marking fields are carried inside an IP header: QoS, CoS, DE, ToS byte, User Priority, ToS bits, CLP, Precedence, QoS Group, DSCP, MPLS Experimental, or DS?

14 Which of the following QoS marking fields are never marked inside a frame that exits a router: QoS, CoS, DE, ToS byte, User Priority, ToS bits, CLP, Precedence, QoS Group, DSCP, MPLS Experimental, or DS?

15 Describe the goal of marking near the edge of a network in light of the meaning of the term "trust boundary."

16 Define the meaning of MQC, and spell out what the acronym abbreviates.

17 What configuration command lists the classification details when configuring CB marking? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

18 What configuration command lists the marking details when configuring CB marking? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

19 What configuration command enables CB marking? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

20 What configuration command lists the classification details when configuring CAR? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

21 What configuration command lists the marking details when configuring CAR? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

22 What configuration command enables CAR? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

23 What configuration command lists the classification details when configuring PBR? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

24 What configuration command lists the marking details when configuring PBR? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

25 What configuration command enables PBR? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

26 Describe the process dial peers use to classify and mark traffic.

27 What configuration command(s) lists the marking details when configuring dial peers? What configuration mode must you use to configure the command? What commands must you issue to place the configuration mode user into that mode?

28 What QoS values can a dial peer mark?

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