Perpetrators seek to make a machine or network resource unavailable to its intended users by disrupting services.
Denial of service is typically accomplished by flooding the targeted machine or resource with superfluous requests, overloading systems, and preventing legitimate requests from being fulfilled.
A single-machine DoS attack is uncommon nowadays. Instead, DDoS (distributed denial-of-service) attacks from multiple computers across the web have become more common, sometimes involving hundreds or thousands of systems.
Criminals launch DDoS attacks to target high-profile web servers, such as banks, for reasons like revenge or blackmail.
By sending too many requests, the hacker makes it impossible for the server to process legit requests, causing the website to slow or shut down, like a business closing its doors.Back to Glossary
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