Certified Ethical Hacker (CEH v11) — Question 245

Which of the following provides a security professional with most information about the system's security posture?

Answer options

• A. Phishing, spamming, sending trojans
• B. Social engineering, company site browsing tailgating
• C. Wardriving, warchalking, social engineering
• D. Port scanning, banner grabbing service identification

Correct answer: D

Explanation

The correct answer is D because port scanning and banner grabbing are effective techniques for identifying open ports and services running on a system, which helps assess its security posture. Options A, B, and C involve tactics that either compromise security or gather information in less systematic ways, making them less effective for evaluating security status.