Answers to the review questions can be found in Appendix A, "Answers to Review Questions."
| 1: | What is the command to see the status of the D channel of the IOS-based ISDN router? In which mode of the IOS router can you type the command? |
| 2: | If you want to see what IP address has triggered the last call in Cisco 77x router, what command should you type? |
| 3: | What do you look for in the output of the IOS command Router#sh isdn status to be sure if the physical layer in BRI is functional? |
| 4: | What IOS command enables you to distinguish between internal and external ISDN issues? |
| 5: | If you want to debug Layer 2 of ISDN, what is the first IOS command you have to type? |
| 6: | Under normal circumstances, what messages should you not see from the output of Router#debug isdn q921? |
| 7: | What are you looking for in the output of the IOS command Router#sh isdn status to be sure if Layer 2 is functional? |
| 8: | In the output from the command Router#debug isdn q921, what does TX ->...ai = 127 mean? |
| 9: | If you want to debug Layer 3 of ISDN, what is the first IOS command you have to type? |
| 10: | What is the bearer capability in Q931 messages for 64 kbps data, 56 kbps data, and voice calls? |
| 11: | What is the name of the message indicating that the LCP negotiation is successful? |
| 12: | What is the recommended IOS command to troubleshoot the dialer traffic when the router makes outgoing data calls? |
| 13: | How many lines of PPP CHAP negotiation indicating success can you see in the output of #debug ppp authentication? |
| 14: | If you receive config nack during the PPP authentication negotiation, what does it mean? |
| 15: | When testing the voice features, what are the two recommended IOS commands you can use? |