The "Internet" is a bunch of separate networks operated by different entities. BGP is what allows them to connect to each other by exchanging routing formation.

The "Internet" is a bunch of separate networks operated by different entities. BGP is what allows them to connect to each other by exchanging routing formation. There was something called the mbone back in the day. Nowadays you can't really send random multicast, but its very much in use by ISPs for IPTV.