Hybrid-DDoS protection is the intelligent and automated combination of on-premises and cloud-based mitigation.
For smaller DDoS attacks such as state-exhaustion and application-layer attacks, the best method of protection is to deploy stateless protection on the premises.
For volumetric DDoS attacks that are larger than the internet pipe, cloud-based mitigation is the best/only form of protection.
Since DDoS attacks use a combination of attack vectors, Hybrid-DDoS protection provides the intelligent and automated combination of on-premises and cloud-based mitigation.