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Ping Command - How to test Network Adapter


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#1 Scoop8

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Posted 03 February 2014 - 04:06 PM

I've been reading about the Ping command and there seems to be conflicting information about the "loopback" test, using the Ping address 127.0.0.1  , whether that tests the Network Adapter hardware or just the TCP/IP configuration.

 

Does the Ping loopback (127.0.0.1) test the PC's Network Adapter functionality, whether it's on the MoBo or a Network Card?

 

Everything's working ok on my PC.  I was just curious about the differences when or if I might need to use the Ping command for a quick troubleshooting method before looking at the Ethernet Cable LED's.

 



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#2 dc3

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Posted 03 February 2014 - 04:33 PM

See if this helps.

 

A computer on the network is identified by what is known as an IP address, which consists of four numbers separated by dots, such as 127.0.0.1. However, there is one address that cannot be used by any computer in the world, and that address is 127.0.0.1. The reason is that this address has been reserved as what is known as the loopback address. A loopback address is an address that tells the computer not to test its connections to another computer, but to test its own basic network setup.

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#3 JohnnyJammer

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Posted 03 February 2014 - 11:18 PM

I've been reading about the Ping command and there seems to be conflicting information about the "loopback" test, using the Ping address 127.0.0.1  , whether that tests the Network Adapter hardware or just the TCP/IP configuration.

 

Does the Ping loopback (127.0.0.1) test the PC's Network Adapter functionality, whether it's on the MoBo or a Network Card?

 

Everything's working ok on my PC.  I was just curious about the differences when or if I might need to use the Ping command for a quick troubleshooting method before looking at the Ethernet Cable LED's.

 

 

 

Basically pinging the loopback just lets you know that the TCP/IP has loaded at run time.



#4 Scoop8

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Posted 05 February 2014 - 06:30 PM

 

See if this helps.

 

A computer on the network is identified by what is known as an IP address, which consists of four numbers separated by dots, such as 127.0.0.1. However, there is one address that cannot be used by any computer in the world, and that address is 127.0.0.1. The reason is that this address has been reserved as what is known as the loopback address. A loopback address is an address that tells the computer not to test its connections to another computer, but to test its own basic network setup.

 

 

Thanks for the info.  I read that when I was looking into the topic.  I recall there was some discussion about the question of the hardware (testing the actual Adapter or network Card)

 

 

 

 

Basically pinging the loopback just lets you know that the TCP/IP has loaded at run time.

 

 

Thanks.  I guess there's no way to actually test the hardware with the Ping loopback.



#5 Kilroy

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Posted 06 February 2014 - 09:53 AM


Thanks.  I guess there's no way to actually test the hardware with the Ping loopback.

 

 

Correct.  Pinging 127.0.0.1 checks the IP stack.  However, you can ping near to far to see where your issue is.

 

  1. Ping 127.0.0.1 (tests the IP stack, is the TCP/IP stack configured and working)
  2. Ping your actual IP address, can be found via IPCONFIG
  3. Ping LAN side of the router, normally your Default Gateway as shown in IPCONFIG
  4. Ping the WAN side of the router, What is My IP
  5. Ping the site you are having issues with.

You can also use TRACERT to see where your issue may be.






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