Denial of service attack (DoS attack) or distributed denial of service attack (DDoS attack) is a type of external Internet attack, in which multiple sources attack a single target computer system causing a Denial of Service (DoS) attack, with the goal being denial of service for its users.
A DoS attack or denial-of-service attack is an attempt to make a computer resource unavailable to its intended users.
Not all service outages, even those that result from malicious activity, are necessarily denial-of-service attacks. Denial-of-service attacks can essentially disable your computer or your network.
The basic types of DoS attack are:
- Consumption of computational resources, such as bandwidth, disk space, or processor time