127.0.0.1 is the loopback address in IP.... or in the (slightly modified) words of Dorthy Gale when she returned from Oz "There's no place like 127.0.0.1"
ping 127.0.0.1 CompTIA A+ page 972
to test a network cable
Use the PING (and current IP address) command to execute a loopback test on a NIC
ping 127.0.0.1 CompTIA A+ page 972
it's the loopback address. The IP address listed under it can be pinged to test to see if your NIC is working
The usual loopback address is 127.0.0.1 (but any address between 127.0.0.0 and 127.255.255.255 can be assigned to it) The address is also known as http://localhost/. In order to test the connection however a server would have to be installed. Apache is an example of a web based software server.
Loopback address
127
Local loopback address
The loopback address for each machine is 127.0.0.1, regardless of how many machines are on the network.
resever ip of loop back is 127.0.0.1