The questions and scenarios in this book are more difficult than what you should experience on the actual exam. The questions do not attempt to cover more breadth or depth than the exam; however, they are designed to make sure that you know the answers. Rather than allowing you to derive the answers from clues hidden inside the questions themselves, the questions challenge your understanding and recall of the subject. Hopefully, these questions will help limit the number of exam questions on which you narrow your choices to two options and then guess.
The answers to these questions can be found in Appendix A.
| 1. | By default, what does a router or Layer 3 switch do with multicast packets? |
| 2. | By default, what does a Layer 2 switch do with a multicast packet? |
| 3. | What high-order bit combination signals that an IP address is used for multicast? |
| 4. | If the IP-to-MAC multicast address mapping is somewhat ambiguous, how can a frame be forwarded to the correct destination group? |
| 5. | What IP multicast address range is set aside for use only on the local network segment? |
| 6. | For the RPF check, the source IP address is looked up in the unicast routing table. To forward the packet, what should the result of the test be? |
| 7. | What important difference exists between IGMPv1 and IGMPv2? |
| 8. | To join a multicast group, what type of message is sent? Where is this message sent? |
| 9. | What is the purpose of the IGMP querier? |
| 10. | For PIM dense mode, how is the multicast tree built? |
| 11. | Where is the root of the PIM sparse-mode tree located? |
| 12. | With PIM sparse-dense mode, is the PIM mode determined per interface or per group? |
| 13. | What routing table is used for PIM? |
| 14. | What command is used to configure an interface for the hybrid PIM mode? |
| 15. | When a switch performs IGMP snooping, what is it snooping for? |
| 16. | What else does a Layer 2 switch need when it is configured for CGMP? |
| 17. | When should IGMP snooping and CGMP be used together on a switch? |
| 18. | At a trade show, several PCs and servers are connected to a single Layer 2 switch. The switch has CGMP enabled. When a server begins to send video data to a multicast address, what happens to that traffic? |
