GISP: GIAC Information Security Professional CertificationDemo

A Distributed Denial of Service (DDoS) attack is characterized by an attacker leveraging a large number of compromised hosts (a botnet) to simultaneously send traffic or requests to a single target system or network, overwhelming its resources, bandwidth, or processing capacity so that it becomes unavailable to legitimate users. This distinguishes it from brute force and dictionary attacks, which are credential-guessing methods performed typically from a single source, and from replay attacks, which involve intercepting and retransmitting valid data to gain unauthorized access rather than using multiple systems to overwhelm a target.