Over the last several years, Distributed Denial of Service (DDoS) attacks have grown significantly in frequency, intensity and sophistication. This growth has largely been fueled by the exponential rise in the number of IoT devices and the ever-growing bandwidth available to them. The growth of wireline and wireless networks and roll-outs of new technologies like 5G and distributed edge architectures have expanded the threat and attack surface, with DDoS attacks coming from all directions and aimed at all types of targets – network infrastructure, business and residential customers. Continued deployment of legacy DDoS security solutions results in massive costs required to scale to keep up with rapidly growing DDoS traffic. The Nokia DDoS security solution, centered around Nokia Deepfield Defender, combines big data analytics and advanced, programmable IP routers to deliver a next-generation DDoS detection and mitigation solution with significant benefits over legacy (appliance-centric or DPI-centric) approaches: better scalability, improved detection (with lower false positives), more agile and granular, network-based mitigation – and all this with much-improved cost efficiency. This solution sheet provides an overview of Nokia Deepfield Defender, outlining key features and innovation areas that empower it to be a cornerstone of a holistic, 360-degree DDoS security solution required for the cloud, IoT and 5G era.