Traditionally, that refers to the computer named "ycombinator" on your local network, and the domain directed the networking stack to some external network. Ev

Traditionally, that refers to the computer named "ycombinator" on your local network, and the domain directed the networking stack to some external network. Eventually, the community recognized that everyone should agree on what name to use for each network, and domain registries were born, along with the traditional TLDs.