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DQOS Exam Certification Guide - Cisco press.pdf
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654 Chapter 8: Call Admission Control and QoS Signaling


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 CDROM 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.

Call Admission Control Concepts

1Why is CAC needed in an environment where LLQ has been properly implemented?

2Name four possible measures that a CAC mechanism can take in the event that the resources are not available to proceed with the call.

3How does a common channel signaling circuit, such as PRI, react to CAC

4How does a channel-associated signaling circuit, such as E&M or T1 CAS, react to CAC?

5What is the difference between payload bandwidth and the bandwidth per call required for a voice conversation?

Local-Based CAC

6What is the definition of local-based CAC?

7Name three of the five available local-based CAC mechanisms.

8What Cisco IOS command is used to enable physical DS0 limitation?

9What Cisco IOS command is used to enable CAC on a VoFR network?

10What type of circuit, CAS or CSS, will Local Voice Busyout (LVB) be most beneficial for?

Resources-Based CAC 655

Measurement-Based CAC

11What is the definition of measurement-based CAC?

12What is the difference between LVBO and Advanced LVBO?

13What is the difference between an SAA packet and a ping packet?

14What measurements are gathered by SSA probes for PSTN fallback?

15What Cisco IOS command is used to allow the destination node to participate in measurement based CAC

Resources-Based CAC

16What is the definition of resource-based CAC?

17Which resources can resource availability indication (RAI) currently monitor?

18Which Cisco CallManager call-processing model utilizes location-based CAC?

19For a gatekeeper to provide CAC, what must be configured for each link that requires protection?

20What is IntServ and how does it work?

21Name the messages used by RSVP to provide resource reservation and CAC.

22What level of service must be in place to provide CAC?

23Which RSVP profile should be configured to classify traffic for the priority queue within LLQ?

This chapter covers the following exam topics specific to the DQOS and QoS exams:

DQOS Exam Objectives

Utilize QOS Device Manager to monitor performance, establish baselines, and configure QoS policies.

Utilize QoS Policy Manager to configure advanced QoS policies, scale policy deployment, upload/verify/roll back policies, and deploy QoS policies by external time-based/event-based scripts.

Configure Cisco Service Assurance Agent to measure key SLA metrics and monitor network performance between local and remote devices.

Monitor and troubleshoot network performance with IPM and SMS.

Design a converged multiservice network to provide proper QoS for voice, video, and data traffic.