The technology that enables smooth and fast video streaming over the internet is called Content Delivery Network (CDN). CDNs distribute video content through a network of servers located globally, reducing latency and buffering during playback. By caching content closer to users, CDNs enhance the delivery speed and quality of streaming services. They are optimized for handling large traffic volumes, allowing platforms to deliver seamless experiences even during peak usage. Major streaming services leverage CDNs to serve high-definition video efficiently without interruptions.