#cn #loopbackaddress
Why is 127.x.x.x range reserved for loopback address? Why can't we just put source address and destination address same? Won't it have the same effect? Then why waste an entire IP range for LOOPBACK ADDRESS?
Rohit Panwar @panwarrohit
11 Nov 2019 12:00 pm
@sarvajit An address that sends outgoing signals back to the same computer for testing. In a TCP/IP network, the loopback IP address is, and pinging this address will always return a reply unless the firewall prevents it. The loopback address allows a network administrator to treat the local machine as if it were a remote machine.
Sarvajit @sarvajitsankar
11 Nov 2019 04:10 pm
This answer isn't really answering my query though.
Sarvajit @sarvajitsankar
11 Nov 2019 04:11 pm
I want to know the reason why the implementation I suggested in question isn't used
Rohit Panwar @panwarrohit
12 Nov 2019 10:27 pm
@sarvajit ...first thing is that loop back addressing is not used as source address..it is always used as destination address... loop back addressing is used in many ways like to check connection is active or not between client and server on the same machine OR it can be used to test nic in your network or other network.So always used as destination address.Now you second doubt is why 127.X.X.X is wasting for this purpose ,it may be depend on the implementation
standard.In computer networks when we see 127.X.X.X other then all zero or all one we come to know that it is loop back address.
Sarvajit @sarvajitsankar
12 Nov 2019 09:19 pm
Ok, thank you
Adeema jain @adeema
12 Nov 2019 11:07 pm
Sarvajit @sarvajitsankar
18 Nov 2019 02:26 pm
This helped, thanks!