Which type of attack is an application attack?

A ping of death is a network layer (Layer 3/4) attack that exploits vulnerabilities in how systems handle oversized or malformed ICMP packets, potentially causing a system crash.

An ICMP (ping) flood is a network layer (Layer 3) denial-of-service attack that overwhelms a target with a high volume of ICMP echo requests, consuming bandwidth and system resources.

An HTTP flood is an application layer (Layer 7) attack that aims to overwhelm a server or application by sending a large volume of seemingly legitimate HTTP GET or POST requests, consuming server resources and rendering it unavailable to actual users. This attack specifically targets the web server application rather than the network infrastructure.

A SYN flood is a transport layer (Layer 4) denial-of-service attack that exploits the TCP three-way handshake by sending a flood of SYN requests without completing the final ACK, leaving the server's connection tables full.