DDoS (Distributed Denial of Service) attacks aim to overwhelm a target’s resources with excessive traffic, disrupting availability, whereas other attack types target different goals.
Why D is correct:Brute force attacks focus on guessing credentials (e.g., passwords) to gain unauthorized access, not on denying service. CNSP classifies it as an authentication attack, not a DDoS method.
Why other options are incorrect:
A:SYN Flood exhausts TCP connection resources, a classic DDoS attack.
B:NTP Amplification leverages amplified responses to flood targets, a DDoS technique.
C:UDP Flood overwhelms a system with UDP packets, another DDoS method.
References:CNSP "DDoS Attack Types" (Section on Attack Classification) excludes brute force from DDoS categories, listing SYN, NTP, and UDP floods as examples.
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