What kind of attack involves an overwhelming number of requests sent to a server to disrupt its normal operations?

A Distributed Denial-of-Service (DDoS) attack involves multiple compromised systems (often referred to as a botnet) sending an overwhelming number of requests to a target server, with the intent of overwhelming its capacity to respond to legitimate requests. This results in a service disruption or complete denial of service to users. DDoS attacks are particularly damaging because they can be difficult to mitigate, as the traffic comes from many different sources. Option A is incorrect because CSRF attacks focus on unauthorized actions, not overwhelming a server with traffic. Option C is incorrect as SQL Injection involves injecting malicious SQL queries into a database, not disrupting server operations with traffic. Option D is incorrect since XSS involves injecting malicious scripts into web pages, not disrupting server services. Option E is incorrect because a Brute Force Attack involves trying multiple password combinations, not overwhelming the server with traffic.