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Question on IP 127.0.0.1

  1. Feb 5, 2010 #1
    hey everyone,

    so I know that 127.0.0.1 or localhost just loops back to your local machine. However, I don't understand what occurs on the packet level when you actually type in 'localhost' or '127.0.0.1' One of my co-workers speculated that each computer has some sort of internal name-resolver program that, when a user types in those special strings, is automatically called & just re-directs back to the local computer. Does this sound valid?

    Does anyone know what exactly happens on the packet level?

    thanks,

    --Jonathan
     
  2. jcsd
  3. Feb 5, 2010 #2

    CRGreathouse

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    Yep, that's pretty much it. Anything outside your computer that somehow gets a loopback address will just drop it anyway, so your computer has to handle it. This is what you want, of course, since it's much faster than a real network connection.
     
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