CompTIA Network+ Question C-5

Packet analysis reveals multiple GET and POST requests from an internal host to a URL without any response from the server. Which of the following is the BEST explanation that describes this scenario?

A. Compromised system
B. Smurf attack
C. SQL injection attack
D. Man-in-the-middle

Correct Answer: A

As the extra unexplainable traffic comes from an internal host on your network we can assume that this host has been compromised.
If your system has been compromised, somebody is probably using your machine–possibly to scan and find other machines to compromise