Distributed Denial of Service attacks (DDoS) are getting larger and more sophisticated causing stress on even the largest networks and applications. ThousandEyes helps security and network operations teams to gain in-depth DNS, network and BGP visibility into DDoS events as they’re happening. Reviewing actual DDoS attacks on leading online services, we share how to visualize impact of an ongoing DDoS attack, ensure DDoS mitigation is correctly configured and working as expected, and provide insight into your DDoS vendor’s performance, including isolating specific scrubbing centers that may be problematic.