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.
You can find the answers to these questions in Appendix A.
| 1. | What is synchronization in RSTP? |
| 2. | What is an alternate port? |
| 3. | What is the difference between an alternate port and a backup port? |
| 4. | Can a switch port be a designated port and be in the Discarding state? |
| 5. | Which port type cannot participate in RSTP synchronization? |
| 6. | What two messages must be exchanged during RSTP synchronization? |
| 7. | After an agreement message is received from a neighboring switch, how much time elapses before the port can begin forwarding? (Consider any timers that must expire or other conditions that must be met.) |
| 8. | After a switch receives news of a topology change, how long does it wait to flush entries from its CAM table? |
| 9. | What command configures a port as an RSTP edge port? |
| 10. | Suppose interface FastEthernet 0/1 is in half-duplex mode, but you want it to be considered a point-to-point link for RSTP. What command can accomplish this? |
| 11. | Put the following in order of the number of supported STP instances, from lowest to highest: MST PVST+ CST 802.1D
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| 12. | What three parameters must be configured to uniquely define an MST region? |
| 13. | What parameter does a switch examine to see if its neighbors have the same VLAN-to-MST instance mappings? How is that information passed among switches? |
| 14. | Which MST instance in a region corresponds to the CST of 802.1Q? |
| 15. | Which MST instance is the IST? |
| 16. | When an MST region meets a PVST+ domain, how is each MST instance propagated into PVST+? |
| 17. | Is it wise to assign VLANs to MST instance 0? Why or why not? |
| 18. | The commands have just been entered to define an MST region on a switch. You are still at the MST configuration prompt. What command must you enter to commit the MST changes on the switch? |
| 19. | How can MST configuration information be propagated to other Cisco switches? |
| 20. | A switch can interact with both 802.1D and RSTP. Can it run both PVST+ and MST simultaneously? |
