Loopback addresses (127.0.0.1, ::1) never leave the host. They are the safe place to run network experiments and local servers.
Loopback
The virtual interface that sends traffic back to the same machine: 127.0.0.0/8 and ::1.
Loopback addresses (127.0.0.1, ::1) never leave the host. They are the safe place to run network experiments and local servers.