Denial of Service (DoS)
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def
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forcing a service to fail or become unavailable, often by overloading it or exploiting a design flaw/vulnerability
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purpose
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can be used for competitive advantage, or as a smokescreen to distract from another exploit (e.g., a precursor to a DNS spoofing attack)
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note
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a DoS doesn't have to be sophisticated — even an unintentional network loop or a saturated internet link can cause a "friendly" DoS
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