CompTIA Security+ (SY0-601) — Question 395

A company has installed badge readers for building access but is finding unauthorized individuals roaming the hallways. Which of the following is the most likely cause?

Answer options

• A. Shoulder surfing
• B. Phishing
• C. Tailgating
• D. Identity fraud

Correct answer: C

Explanation

The correct answer is C, tailgating, which occurs when an unauthorized person gains access by following someone with legitimate credentials. Shoulder surfing, phishing, and identity fraud are related to information theft or deception but do not directly explain how someone could physically enter the building without proper clearance.