Answer:
Denial of Service (DoS) attack is a cyber attack aimed at making a website, server, or network unavailable to its users by overwhelming it with traffic or other means of disrupting its normal operations.
Two professions of Denial of Service attack are:
Ping of Death: This is a type of DoS attack that involves sending a ping request packet that is larger than the maximum allowed size of 65,536 bytes, which causes the targeted device to crash or freeze.
Distributed Denial of Service (DDoS): This is a type of DoS attack that involves multiple devices or computers flooding a target website or server with traffic, making it unavailable to legitimate users. DDoS attacks are typically coordinated through a botnet, which is a network of infected devices that can be controlled remotely by the attacker.