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What is the use of loop back IP address?

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  • What is the use of loop back IP address?

    I googled about it but no good results.

    Thanks in advance.

  • #2
    Re: What is the use of loop back IP address?

    Typically for testing purposes. For example if you build a new server for web hosting. Before moving it into production you can build, test and configure using 127.0.0.1 or localhost.
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    • #3
      Re: What is the use of loop back IP address?

      When you ping local host (127.0.0.1) you test the functionality of the network card and TCP/IP stack. If the ping succeed you are sure that the NIC drivers are installed ok and tcp/ip stack is installed on local computer

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      • #4
        Re: What is the use of loop back IP address?

        Isn't the info from Wikipedia any good to you? http://en.wikipedia.org/wiki/Loopback

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        • #5
          Re: What is the use of loop back IP address?

          lots of services use the loopback adapter for communications between themselves.

          like a spyware/virus scanner, would listen on a port on localhost, will be sent emails for scanning to that port, and get them back from localhost
          ________
          Babimac
          Last edited by DYasny; 6th March 2011, 19:19.
          Real stupidity always beats Artificial Intelligence (c) Terry Pratchett

          BA (BM), RHCE, MCSE, DCSE, Linux+, Network+

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          • #6
            Re: What is the use of loop back IP address?

            But what a waste of a class A address range !
            Tom Jones
            MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
            PhD, MSc, FIAP, MIITT
            IT Trainer / Consultant
            Ossian Ltd
            Scotland

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