Attackers launch multi-vector DDoS attacks that use DNSSEC amplification

DDoS attacks are becoming increasingly sophisticated, combining multiple attack techniques that require different mitigation strategies, and abusing new protocols.
Incident responders from Akamai recently helped mitigate a DDoS attack against an unnamed European media organization that peaked at 363G bps (bits per second) and 57 million packets per second.
While the size itself was impressive and way above what a single organization could fight off on its own, the attack also stood out because