Certified Ethical Hacker (CEH v12) — Question 300

Which is the first step followed by Vulnerability Scanners for scanning a network?

Answer options

• A. OS Detection
• B. Firewall detection
• C. TCP/UDP Port scanning
• D. Checking if the remote host is alive

Correct answer: D

Explanation

The correct answer is D, as the first step in network scanning is to verify if the remote host is responsive. Options A, B, and C follow this initial check, as they involve identifying the operating system, firewall presence, and open ports, which can only be done if the host is confirmed to be alive.