This command adds two loopback addresses to the system’s network interface configuration.
The first address, 127.0.0.1, is the IPv4 loopback address. This address allows a computer to communicate with itself using the TCP/IP protocol stack without any external network connection.
The second address, ::1, is the IPv6 loopback address. It serves the same purpose as 127.0.0.1 but for IPv6 connections.
By binding these loopback addresses to the system’s network interface configuration, programs running on the computer can use them to communicate with each other locally without needing an actual network connection or going through a router or switch.
Overall, this command is useful for testing and development purposes when working with networking applications that need to connect to themselves locally without sending data over an actual network connection.
