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denial of service attack (DoS), (DDOS)

A denial of service (DoS) attack is a deliberately planned attack on a computer system or network that causes a loss of use of the computer system or network to legitimate users.

Additional Information


Examples of DoS attacks include: flooding network connections to prevent legitimate network traffic, denying communication between systems, preventing a particular individual from accessing an Internet-based service, and disrupting service to a specific system or individual.