In early December, the Boston Public Schools was the target of a "distributed denial of service" incident, or DDoS for short. This kind of incident is caused when a large amount of traffic is directed at a single source, such as a network or a website, in a short amount of time. The resulting traffic overwhelms the normal capacity of the system and prevents normal usage. We produced a video explanation to help our community understand our network layout and what happens when a denial of service hits the network. Check out the video here and you can also find out more information about DDoS by visiting www.digitalattackmap.com/understanding-ddos/.