Troubleshooting Networks

Question 1

What is included in troubleshooting documentation?

Answer 1

1. Description of problem
2. Steps taken to determine cause
3. Steps taken to correct issue

Question 2

What are the 3 troubleshooting methods when looking at the OSI model?

Answer 2

1. Bottom-up
2. Top-down
3. Divide and conquer

Question 3

Which layer do you start with in a bottom-up approach?

Answer 3

The physical layer

Question 4

Where do most networking problems reside?

Answer 4

Lower levels

Question 5

What can be assumed if a layer is found to be functioning?

Answer 5

Layers below are functioning

Question 6

What are 4 non-OSI troubleshooting methods?

Answer 6

1. Follow-the-path
2. Substitution
3. Comparison
4. Educated guess

Question 7

Which method usually complements one of the other approaches?

Answer 7

Follow-the-path

Question 8

What does a solid green light on a router mean?

Answer 8

No traffic

Question 9

What are the 5 command line utilities for diagnosing problems?

Answer 9

1. ipconfig
2. ping
3. netstat
4. tracert
5. nslookup

Question 10

How many hops does tracert attempt before assuming the destination is unreachable?

Answer 10

30

Question 11

What does netstat do?

Answer 11

Displays TCP network connections

Question 12

What does nslookup do?

Answer 12

Directly queries the name server for information on a destination domain