An attacker sends a large number of packets to a target computer that causes denial of service. Which of the following type of attacks is this?

Spoofing involves falsifying the source address or identity in network packets to impersonate another host, which is a deception technique rather than a volume-based denial of service.

Snooping refers to eavesdropping on network traffic to intercept data passively, which does not cause denial of service to the target.

Phishing is a social engineering attack that tricks users into revealing credentials or sensitive information via fraudulent communications, and does not involve sending packets to a target system.

A flooding attack works by saturating a target's network bandwidth, CPU, or memory by sending an extremely high volume of packets - such as UDP floods, ICMP floods, or SYN floods - until the target can no longer process legitimate requests and becomes unavailable.