"Do I Know This Already?" Quiz The purpose of the "Do I Know This Already?" quiz is to help you decide what parts of this chapter to use. If you already intend to read the entire chapter, you do not necessarily need to answer these questions now. The quiz, derived from the major sections in the "Foundation Topics" portion of the chapter, helps you determine how to spend your limited study time. Table 15-1 outlines the major topics discussed in this chapter and the "Do I Know This Already?" quiz questions that correspond to those topics. Table 15-1. "Do I Know This Already?" Foundation Topics Section-to-Question MappingFoundation Topics Section | Questions Covered in This Section | Score |
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Multicast Overview | 17 | | Routing Multicast Traffic | 811 | | Switching Multicast Traffic | 12 | | Total Score | | |
Caution The goal of self-assessment is to gauge your mastery of the topics in this chapter. If you do not know the answer to a question or are only partially sure of the answer, you should mark this question wrong. Giving yourself credit for an answer you correctly guess skews your self-assessment results and might give you a false sense of security.
| 1. | How many sources are typically present in a multicast group? 1 2 As many as are registered with the router Cannot be determined
| | 2. | Which one of the following is a multicast address? 128.224.1.1 172.17.224.1 225.17.1.1 242.17.1.1
| | 3. | 224.1.2.3 corresponds to which of the following MAC addresses? 0102.0300.0000 0100.5e01.0203 e000.0001.0203 1000.5e01.0203
| | 4. | How many unique multicast IP addresses can correspond to one multicast MAC address? 1 2 8 32
| | 5. | Which of the following is the test that is performed before a multicast packet can be forwarded? Shortest path first Cyclic redundancy check Reverse Path Forwarding Multicast route verification
| | 6. | Which protocol registers hosts for multicast group membership? CGMP IGRP IGMP PIM
| | 7. | A host sends Internet Group Management Protocol (IGMP) packets to which of the following? The local switch The local router The multicast source The root of the multicast tree
| | 8. | If a multicast group has recipients on every subnet, which of the PIM modes should be used? Dense mode Sparse mode Sparse-compress mode Flood mode
| | 9. | Which type of tree structure is built for sparse-mode multicast routing? Spanning tree Shared tree Sparse tree Simple tree
| | 10. | What router maintains the RP-to-group correlation for Auto-RP in PIMv1? RP agent PIM root Mapping agent RP discovery server
| | 11. | What router advertises candidate RP routers in PIMv2? Auto-RP Mapping agent Bootstrap router PIM root
| | 12. | Which of the following methods requires a router to assist a Layer 2 switch in constraining multicast traffic? PIM IGMP CGMP IGMP snooping
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You can find the answers to the "Do I Know This Already?" quiz in Appendix A, "Answers to Chapter 'Do I Know This Already?' Quizzes and Q&A Sections." The suggested choices for your next step are as follows: 10 or less overall score Read the entire chapter. This includes the "Foundation Topics," "Foundation Summary," and "Q&A" sections. 11 or 12 overall score If you want more review on these topics, skip to the "Foundation Summary" section and then go to the "Q&A" section at the end of the chapter. Otherwise, move to Chapter 16, "IP Telephony."
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