Distributed Denial of Service (DDoS)

A distributed denial-of-service (DDoS) is where the attack source is more than one, often thousands of, unique IP addresses. It is analogous to a group of people crowding the entry door or gate to a shop or business, and not letting legitimate parties enter into the shop or business, disrupting normal operations. The scale of DDoS attacks has continued to rise over recent years, even reaching over 400Gbit/s.