How does the internet send data around the world?

When you send a message or load a webpage, your device converts the information into packets with addressing data. Routers read those addresses and forward the packets across local networks, fibre-optic backbones, undersea cables, and wireless links. TCP/IP is the core set of protocols that standardizes how data is packaged, addressed, transmitted, and received. The modern internet grew from ARPANET, which began in 1969, and expanded into a global network of networks. Because packets can take different routes, the internet is resilient and can reroute around failures.