In denial-of-service attacks, which form is described as the most common?

• A. DoS
• B. DDoS
• C. Phishing
• D. Brute Force

Answer: (B)

The main idea here is that denial-of-service attacks are most effective and commonly seen when they come from many sources. Distributed denial-of-service uses a botnet—thousands of compromised devices that flood the target with traffic from multiple angles. This broad, multi-location assault overwhelms bandwidth and server resources more reliably and is much harder to defend against than a single-source attack. That widespread approach is why this form is described as the most common. Phishing and brute force aren’t denial-of-service methods—they involve social engineering or credential guessing, not overwhelming a system’s resources.