ping loopback with tcp/ip disabled

Windows XP

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  • 1. Ether net card problems
    hi all This is my first posting to this group.Hope u guys will help. Well i have two PC1 and PC2 CONFIGURATION PC1 : Fairly New P4(1.7 GHz)+128 RAM+WINXP+40GB HDD PC2: Quite Old p2(825 MHz)+128RAM + WINXP + 40GB HDD NIC=Network Interface Card or ethernet card Now when my pc1 is on and i remove or add NIC then it does not hang (while the pc is on)but in pc2 it jus hangs when i try to remove or add a NIC why that so .ALSO i have two nics one is working and another is damaged but in PC-1 when i boot with the damaged one attached it does not have a problem booting up but in pc2 when i try to boot up with the damaged NIC it does not boot up and shows the orange light.my damaged NIC was working a month ago and then i removed it and kept it aside but when i added it back it is not working.why that so .my cd rom was not working a couple of months ago so i removed it and now i have connected it back and miracaliously it worked.how i confused as to how these thing happen . i mean how can things stop working when u dont use them or use them and viceversa .therfore should i wait for my DAMAGED NIC to work back. is their a possibility. thnks in advance. Arpit
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ping loopback with tcp/ip disabled

Postby d2FsbHlfbGxhbWEx » Sat, 03 Feb 2007 12:12:07 GMT

Pinging the loopback address tests confirms that TCP/IP is running, correct?

Is there any reason that I can still ping the loopback address even though I 
have disabled TCP/IP? Or is my understanding of what pinging the loopback 
address does wrong?

Re: ping loopback with tcp/ip disabled

Postby Steve Winograd [MVP] » Sat, 03 Feb 2007 18:52:31 GMT

In article < XXXX@XXXXX.COM >,



The loopback address is internal to the TCP/IP stack and can be used
even with no installed network adapters.

How did you disable TCP/IP?
-- 
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see.  I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
 http://www.**--****.com/ 

Re: ping loopback with tcp/ip disabled

Postby d2FsbHlfbGxhbWEx » Sun, 04 Feb 2007 11:26:01 GMT







I disabled TCP/IP through the properties of the connection under the 
networking tab. A lab in the Microsoft 272 book instructed me to disable 
TCP/IP by unchecking the box there, which should keep pinging the loopback 
from working. It did not, and my instructor did not have an answer as to why.

Does unckecking the box not actually disable TCP/IP for the connection?

Re: ping loopback with tcp/ip disabled

Postby Steve Winograd [MVP] » Sun, 04 Feb 2007 16:46:19 GMT

In article < XXXX@XXXXX.COM >,



Unchecking the box disables TCP/IP on that network connection, and
only on that network connection.  It has no effect on other network
connections, and it has no effect on the loopback address.

The loopback address isn't associated with any network connection.
It's internal to the TCP/IP stack, and TCP/IP runs even when TCP/IP
isn't bound to any network connections.   To demonstrate that, you can
un-install all network adapters, open a command prompt window, and use
the "route print" command to show the TCP/IP route table.  It will
show:
  
   127.0.0.1  255.0.0.0  127.0.0.1  127.0.0.1  1
-- 
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see.  I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
 http://www.**--****.com/ 

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