The technology that allows for the streaming of music online includes cloud computing, streaming protocols, and content delivery networks (CDNs). Streaming services such as Spotify or Apple Music utilize cloud infrastructure to store vast music libraries accessible via the internet. Users can access this content in real-time without needing to download files, thanks to efficient streaming protocols that manage data transmission. CDNs help deliver content faster by caching data closer to users, improving load times and overall user experience. This seamless access to music has transformed how we consume audio content.