if you send a TCP ACK segment to a known closed port on a firewall but it does not respond with an RST.
what do you know about the firewall you are scanning?

This kind of password cracking method uses word lists in combination with numbers and special characters:

What is a NULL scan?

What is the role of test automation in security testing?

Hackers often raise the trust level of a phishing message by modeling the email to look similar to the internal email used by the target company. This includes using logos, formatting, and names of the target company.
The phishing message will often use the name of the company CEO, President, or Managers. The time a hacker spends performing research to locate this information about a company is known as?