What is a DDoS attack?

A Distributed Denial of Service (DDoS) attack is characterized by an attempt to overwhelm a server or network service with a flood of traffic coming from multiple sources. The primary goal of this type of attack is to exhaust the resources of the targeted server, making it unable to handle legitimate requests. In doing so, it disrupts services, potentially leading to downtime or complete service unavailability.

This method often involves a network of compromised devices, often referred to as a botnet, which are controlled by an attacker to send massive amounts of traffic simultaneously to the targeted system. This not only hinders access for legitimate users but can also cause significant operational and financial damage to businesses.

The other options describe different scenarios that do not align with the nature of a DDoS attack. Data stealing refers to unauthorized extraction of information, which is unrelated to overwhelming service capacity. Enhancing server performance is a positive action aimed at improving efficiency and is not connected to attack methodologies. Lastly, a procedure for backing up data remotely implies safeguarding data, which stands in direct contrast to the disruptive intent of DDoS attacks.