Denial of Service Attack
Abbreviation, DoS attack.
An illegal act, with the intent of disabling a server.
A server responds to external requests from its network. For example a web server responds to a browser calling for a web page to be delivered from its hard drive.
Each request takes a small amount of time and some CPU resources on the server. With a 'Denial of Service' attack, the server is overwhelmed by millions of rogue requests being sent it, effectively using up all its resources and denying normal service for legitimate users.
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