What is 127.0.0.1?

الكاتب : Rita Alshoaibi   المشاهدات : 725   الردود : 9    ‏2007-11-28
      مشاركة رقم : 1    ‏2007-11-28
  1. Rita Alshoaibi

    Rita Alshoaibi مشرف سابق

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    127.0.0.1 is a reserved IP address corresponding to the host computer. Known as the loopback address, 127.0.0.1 is used whenever a program needs to access a network service running on the same computer as itself. Although mainly used as a testing and development address, the loopback address can be used to access local services, such as webservers, that are usually only accessed over a network and have no local interface. Additionally, most modern operating systems that implement TCP/IP regard the name "localhost" as being .....alent to 127.0.0.1.

    The address 127.0.0.1 is defined by the TCP/IP protocol as a reserved address that routes packets back to the host. Thus, no computer connected to the Internet, or any other TCP/IP compliant network, can identify itself as 127.0.0.1. The Internet Engineering Task Force's RFC 3330 defines 127.0.0.1 and 12 other special-use IPv4 addresses. Any public router or gateway that receives a packet destined for a special-use IP is required to drop it, without logging it's .......s. Thus, if such a packet is accidentally forwarded outside of it's host, the packet will not accidentally arrive at another ........ that is willing to accept it and answer. This requirement helps provide network security, as even a machine that is configured to appear invisible on a network will likely answer packets addressed to it's loopback address. Additionally, some services may be unexpectedly activated by responding to such a stray packet.

    127.0.0.1 logo

    A successful ping request to 127.0.0.1 will verify that a computer's network interface card, it's drivers, and the operating system's TCP/IP implementation are all functioning correctly. However, in addition to it's use as a troubleshooting and local access tool, 127.0.0.1 is often used in practical jokes and scams. One popular prank is to assign first-year computer science students to either crack or otherwise probe 127.0.0.1. Other variations include service technicians who 'prove' their network's speed and reliability by having customers ping the loopback address. Many anecdotes about the "World's Worse Hacker" performing a DDoS attack, or similar malicious feat, on 127.0.0.1 circulate the Internet.
     
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  3. yemen_samurai

    yemen_samurai عضو متميّز

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    now that what i called ( something useful ) to get here in Majlis

    thanks sister Rita
     
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  5. yemen_samurai

    yemen_samurai عضو متميّز

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    previously, loops were created by hardware means
    that was for checking and testing a particular link or trunk in the early PCMs and PDH

    i think the same idea is applied now for the large exchanges as well
     
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  7. Rita Alshoaibi

    Rita Alshoaibi مشرف سابق

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    thanks a lot magdi for passing by
    and adding ur opinion



    [​IMG]
     
  8.   مشاركة رقم : 5    ‏2007-11-29
  9. BLUE RAY

    BLUE RAY عضو متميّز

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    thank u sister rita for ur topic


    u have always inspired this forum with ur great topic
     
  10.   مشاركة رقم : 6    ‏2007-11-29
  11. VANDAM AL-YEMEN

    VANDAM AL-YEMEN عضو نشيط

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    cooooool shot
    good job
    keep it up and forward
    eventhough I am not that familiar with IT stuff
    but this one might help

    thanks a lot for this

    Best wishes
     
  12.   مشاركة رقم : 7    ‏2007-11-30
  13. Rita Alshoaibi

    Rita Alshoaibi مشرف سابق

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    masha allah
    what a kind and nice reply

    thanks BLUE RAY for this
    and jumah mubaraka



    [​IMG]
     
  14.   مشاركة رقم : 8    ‏2007-11-30
  15. Rita Alshoaibi

    Rita Alshoaibi مشرف سابق

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    masha allah
    what a kind and nice reply

    thanks BLUE RAY for this
    and jumah mubaraka



    [​IMG]
     
  16.   مشاركة رقم : 9    ‏2007-11-30
  17. Rita Alshoaibi

    Rita Alshoaibi مشرف سابق

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    thanks for ur nice pass
    and
    u know we are always learning and in shaa allah
    sometimes we are used with this stuff



    jumah mubaraka



    [​IMG]
     
  18.   مشاركة رقم : 10    ‏2007-11-30
  19. Rita Alshoaibi

    Rita Alshoaibi مشرف سابق

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    thanks for ur nice pass
    and
    u know we are always learning and in shaa allah
    sometimes we are used with this stuff



    jumah mubaraka



    [​IMG]
     

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