What type of attack occurs when an attacker sends a flood of protocol request packets to various IP hosts and the attacker spoofs the source IP address of the packets, such that each packet has the…

In a reflection attack, the attacker inserts the victim's IP address as the source in packets sent to many legitimate servers; those servers then send their protocol responses - reflected - back to the victim's address, flooding the target without requiring direct attacker-to-victim communication and obscuring the attacker's identity.

An amplification attack specifically requires the response to be significantly larger than the request to multiply traffic volume; this scenario describes the reflection mechanism without specifying any size amplification ratio.

A Man-in-the-Middle attack positions the attacker between two communicating parties to intercept or manipulate traffic, not to flood a victim using spoofed third-party reflectors.

A Trojan virus is malicious code disguised as a legitimate program and has no relationship to IP spoofing-based network flood techniques.