I'm trying to understand what loopback interface is used for and /how/ it is works.
Anyone got any examples of how an app uses loopback interface effectively??
I vaguely know it acts like a remote node without actually being one. I'd like the details.
Think of it as a network card, where the TX ethernet pair "loopback" and connect to the RX ethernet pair. Then you can talk ethernet to yourself (and if you can talk ethernet, you can talk IP, TCP, UDP and so on and so forth)
Now instead of actually wasting a PCI slot and plugging in a real NIC and a little RJ-45 adapter that does this wiring trick (which prolly would work BTW), you have a fake device that does it all for you.
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