A Loopback IP address is like a pretend address that a computer gives to itself. It’s used to test if the computer’s internet connection is working properly.
The Loopback address for IPv4 is 127.0.0.1, and for IPv6 it’s ::1. When the computer uses this address, it pretends to send a message out to the internet, but then it just sends it right back to itself. It’s like talking to yourself in a mirror!
This helps the computer check if everything is working properly and that it can send and receive messages correctly. It’s like a quick way for the computer to say, “Hey, am I working okay?” without actually having to send a message out to the internet and wait for a response.
In summary, a Loopback IP address is a pretend address that a computer gives to itself to test if its internet connection is working properly. The IPv4 Loopback address is 127.0.0.1, and the IPv6 Loopback address is ::1. When the computer uses this address, it just sends the message right back to itself to check if everything is working okay.