A denial-of-service attack occurs when someone external blocks access to your network.

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A denial-of-service attack (DoS attack) is a malicious attempt to disrupt normal traffic of a targeted server, service or network by overwhelming the target or its surrounding infrastructure with a flood of internet traffic. The attacker may use many computers, working together as a network, to bombard the targeted server with requests in an attempt to overwhelm it and prevent it from functioning properly. The attack may prevent legitimate users from accessing the targeted service, which can result in lost productivity, revenue, or even reputation damage.

A Denial-Of-Service Attack Occurs When Someone External Blocks Access to Your