A DDoS (Distributed Denial of Service) attack is a type of cyber-attack in which a large number of compromised computer systems, often called a botnet, are used to flood a website or network with traffic in order to make it inaccessible to users. The goal of a DDoS attack is to disrupt the normal traffic of a website or network, often with the intention of making the website inaccessible to users.
DDoS attacks are carried out by hackers who use malicious software to control a large number of compromised computers. These computers are used to send a large amount of traffic to the attacked website or network, overloading the servers and making them unable to respond to legitimate traffic.
DDoS attacks can be difficult to defend against as they often require a large number of computers and a high volume of traffic. Website owners and network administrators can take measures to protect against DDoS attacks, such as using firewalls and implementing rate-limiting policies, but it can be difficult to prevent all attacks. DDoS attacks are illegal in many countries, and law enforcement agencies often work to identify and prosecute those responsible.