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What happens in a loop back?

What happens in a loop back? What does it do?
A loop back is exactly what it sounds like. It sends a signal in a loop. This is commonly used to test interfaces or Point-to-Point troubleshooting. For example, the loop back address on your PC is always To do your own loop back test you could ping If this fails then your network card is not installed correctly or bad.
This was last published in May 2003

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