“Do I Know This Already?” Quiz–Cisco Troubleshooting
Take the quiz (either here or use the PTP software) if you want to use the score to help you decide how much time to spend on
this chapter. Appendix A, “Answers to the ‘Do I Know This
Already?’ Quizzes,” found at the end of the book, includes both
the answers and explanations. You can also find answers in the PTP testing software.
Table 22-1 “Do I Know This Already?” Foundation Topics Section-to-Question Mapping
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 that question as wrong for purposes of the self-assessment.
Giving yourself credit for an answer you incorrectly guess skews your self-assessment results and might provide you with a false sense of security.
a. Determining which failure is the hardest to fix
b. Determining which failure is the easiest to fix
c. Determining which failure to work on first
d. Determining which standard root cause might be the source of this failure
2. Should MTTR include the dwell time?
a. The MTTR should always include the dwell time.
b. The MTTR should never include the dwell time.
c. Whether MTTR should include dwell time is local policy.
d. MTTR and dwell time are not related.
3. Why does adding redundancy not always increase resilience?
a. There might not be an existing single point of failure where redundancy is added.
b. The added redundancy might add enough complexity to make the network react more slowly to failures.
c. Increasing resilience by adding redundancy might not be required.
d. The new link might not be used by the control plane anyway.
4. Why is it problematic to start troubleshooting with the part of the network you are most familiar with?
a. This might not be where the most recent change was made.
b. This might not be where failures often happen.
c. You can spend hours looking for something that is not there.
d. You might not know where the most recent change was made.
5. What are the two stages of the half-split troubleshooting method?
a. Measure and split
b. Observe and orient
c. Decide and act
d. Observe and blame someone else
6. Which of the following describes a permanent fix?
a. Increases technical debt
b. Not well documented
c. Brings the network back to its pre-failure state
d. Will need to be replaced in a short time
7. What kinds of information can you get from a packet capture?
a. Seeing the information that users are requesting from web servers
b. Finding the paths that packets are taking through the network
c. Examining the flow of packets between a host and server for errors
d. The user’s birth date and telephone number
a. When things look broken although they are not
b. When things look normal although they are not
c. Anything that looks “odd”
d. When you are optimistic and you should not be