DoS Attacks

A DoS attack is designed to deny user access to systems or networks. These attacks usually target specific services and attempt to overwhelm them by making numerous requests concurrently. If a system is not protected and cannot react to a DoS attack, it can be easy to overwhelm that system by running scripts that generate multiple requests. It is possible to greatly increase the magnitude of a DoS attack by launching the attack from multiple systems against a single target. This practice is referred to as a DDoS attack. The use of Trojan horses in a DDoS was discussed in the previous section.

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