Denial of Service Attack
Definition: A denial of service attack is one of many threat vectors that is arrayed against an information infrastructure. An overwhelming number of requests for services is sent to the target computer or device. So many requests for service are sent that the device is unable to respond in a timely manner. Thus the function the server is supposed to perform is nullified. Physical harm to systems and people can be the result.
Its Relevance: Catastrophic damage can occur to an otherwise properly functioning network infrastructure if vital information is made to be unavailable to those who need it for decision making. For example, imagine a pressure value that is controlled via the Internet. If the control value is beyond being reached an explosion can occur.
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