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