example.com, example.net, example.org, and example.edu, along with .example, are all classified as the same type of name, reserved for documentation purposes.
Furthermore, there are IPv4 and IPv6 addresses that are reserved for documentation purposes! You never need to write live addresses, or even private RFC 1918 addresses!
https://en.wikipedia.org/wiki/Example.com
example.com, example.net, example.org, and example.edu, along with .example, are all classified as the same type of name, reserved for documentation purposes.
Furthermore, there are IPv4 and IPv6 addresses that are reserved for documentation purposes! You never need to write live addresses, or even private RFC 1918 addresses!
https://en.wikipedia.org/wiki/IPv4#Special-use_addresses