CompTIA Security+ Exam Prep

Answer: B - A DDoS or a Distributed Denial of Service attack uses multiple computer systems to attack a server or host in the network.

A distributed denial-of-service (DDoS) attack is one in which a multitude of compromised systems attack a single target, thereby causing denial of service for users of the targeted system. The flood of incoming messages to the target system essentially forces it to shut down, thereby denying service legitimate users from using the system.