Loopback interface

[Rajendran_1]

Dear Friends,

Asking a very Basic Question :)

What is the loop back interface for ?

Can any one send me any link describing this?

Any explanation will be very usefull..

Thanks,
Rajendran.

[Stuart Browne · Accepted solution]

Loop back interface (as in 'ifconfig lo' yes?) ?

It's the way to say "This is myself" regardless of hardware, or devices.

In a networking world, you should always be able to rely upon one fact:

loopback device = 127.0.0.1 = localhost

If you need to talk to yourself on the network (there are a number of situations where this is a good idea), you can use this.

In a non-networking environment, this device also allows you to use Network based operations, as the Loopback device initilizes the TCP stack.

As for the reasons behind why it was created, you'd probably have to read through the TCP/IP RFC's to find out.

.. probably not the best of explanations, but I hope it helps somewhat .. Possibly someone who's done more detailed work on TCP and IP stacks could give a better reasoning ..

[Rajendran_1]

Thank you Sir...

[Rajendran_1]

thanks

[Sergejs Svitnevs]

http://www.tldp.org/LDP/nag/node66.html

Sergejs

[Rajendran_1]

Thanks Dear...