DDoS stands for “Distributed Denial of Service.” A DDoS attack is a malicious attempt to make a server or a network resource unavailable to users, usually by temporarily interrupting or suspending the services of a host connected to the Internet.
To protect against volume-based attacks, anti-DDoS solution performs large-scale “scrubbing”, using cloud servers to inspect traffic, discard malicious requests and let legitimate ones through. This approach can deal with massive, multi-gigabyte DDoS attacks.