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Network Monitoring - Quiz

The correct answers are indicated below, along with text that explains the correct answers.

1. What is the purpose of the ping command?
Please select the best answer.
  A. To see if a remote machine is working
  B. To query kernel tables for network status information
  C. To follow packets through the network and detect problem network points
  D. To watch network traffic on an individual-packet level

2. For what purpose would you use netstat?
Please select the best answer.
  A. To see if a remote machine is working
  B. To query kernel tables for network status information
  C. To follow packets through the network and detect blockages
  D. To watch network traffic on an individual-packet level

3. Which command would you use to monitor all listening TCP servers on your machine?
Please select the best answer.
  A. netstat -ta
  B. netstat -i
  C. netstat -r
  D. netstat -s

4. What does the output from traceroute show?
Please select the best answer.
  A. Which users have root permissions and which ones do not
  B. A statistical picture of how the different network interfaces are being used
  C. A network address and an appropriate gateway for reaching that network
  D. The sequence of machines across which packets travel

5. For what would you use the ping option -n?
Please select the best answer.
  A. To stop after sending a certain number of packets
  B. To send a packet of a given size
  C. To direct it to ignore the routing table
  D. To direct it not to look up DNS names, only numbers

6. When reading the output from netstat -i, what does the column headed RX-OK mean?
Please select the best answer.
  A. The number of errors
  B. The number of frames dropped
  C. The number of frames received successfully
  D. The number of buffer overruns

7. How would you continually monitor network status on your machine?
Please select the best answer.
  A. netstat -s
  B. netstat -ct
  C. netstat -m
  D. netstat -i

8. What is the purpose of tcpdump?
Please select the best answer.
  A. To monitor network traffic on a particular segment
  B. To locate failures far from your local network
  C. To view the routing table on your machine
  D. To check to see if a remote machine is active