Question: You have just conducted a port scan of a network. There is no well-known port active. How do you find a webserver running on a host, which uses a random port number?

1. Give up on the current target network and move on to the next one.
2. Switch to another network scanning tool. Resort to more resource-intensive probing, like launching random attacks to all open ports.
3. Turn on the stealth mode in your network scanning tool. Check whether you missed any other active ports associated with web servers.
4. Turn on additional options in your network scanning tool to further investigate the details (type and version) of applications running on the rest of the active ports.

Answer: The correct answer of the above question is Option D:Turn on additional options in your network scanning tool to further investigate the details (type and version) of applications running on the rest of the active ports.