A denial-of-service (DoS) attack is when an attacker prevents authorized users from accessing computer systems, networks, services, or other information technology (IT) resources.
A denial-of-service (DoS) attack is when an attacker prevents authorized users from accessing computer systems, networks, services, or other information technology (IT) resources. In these types of attacks, attackers often overload the victim's resources by flooding web servers, systems, or networks with traffic, making it difficult or impossible for anyone else to use the victim's resources.
An attack that brings down a server can usually be fixed by rebooting the system, but recovery from flood attacks is more difficult. Even more challenging is recovering from a distributed denial-of-service (DDoS) attack, where attacks come from multiple sources.
Attacks such as DoS and DDoS often exploit flaws in network protocols and the way they manage network traffic.
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