🛡️ Free practice test question from: ddos (Security+)

SYN Flood is most efficient for the attacker's goal. It requires minimal attacker resources (just sending TCP SYN packets) but forces the target to allocate memory and processing power for each half-open connection, keeping those resources tied up waiting for the connection completion that never comes. This creates a highly asymmetric resource usage ratio.

DNS Amplification relies on DNS servers and typically focuses on bandwidth consumption rather than CPU.

Smurf Attacks leverage broadcast addresses for traffic amplification using ICMP but primarily impact network bandwidth.

Ping of Death involves oversized ping packets, but modern systems are generally patched against this.