ping localhost..

[neo143]

hi guys....
yesterday wen i was jus pinging localhost..
instead of writing 127.0.0.1 i wrote 127.9.0.3
soo C:\>ping 127.9.0.3

Pinging 127.9.0.3 with 32 bytes of data:

Reply from 127.9.0.3: bytes=32 time<10ms TTL=128
Reply from 127.9.0.3: bytes=32 time<10ms TTL=128
Reply from 127.9.0.3: bytes=32 time<10ms TTL=128
Reply from 127.9.0.3: bytes=32 time<10ms TTL=128

n after that wen i ping to any address in the format 127.x.y.z
it replyed from same address..
while i am on windows nt in my lab..
n wen i tried in my home on my comp having windows xp
reply came from 127.0.0.1

so although i know the special class of ip addresses starting from 127. as the first octet
i wanna know why is their difference between NT n Xp..
n why its really happening
i mean do system uses it for system file access or wat..

[ghostmachine]

Originally posted here by neo143
hi guys....
yesterday wen i was jus pinging localhost..
instead of writing 127.0.0.1 i wrote 127.9.0.3
soo C:\>ping 127.9.0.3

Pinging 127.9.0.3 with 32 bytes of data:

Reply from 127.9.0.3: bytes=32 time<10ms TTL=128
Reply from 127.9.0.3: bytes=32 time<10ms TTL=128
Reply from 127.9.0.3: bytes=32 time<10ms TTL=128
Reply from 127.9.0.3: bytes=32 time<10ms TTL=128

n after that wen i ping to any address in the format 127.x.y.z
it replyed from same address..
while i am on windows nt in my lab..
n wen i tried in my home on my comp having windows xp
reply came from 127.0.0.1

so although i know the special class of ip addresses starting from 127. as the first octet
i wanna know why is their difference between NT n Xp..
n why its really happening
i mean do system uses it for system file access or wat..

address in the range 127.x.x.x are loopback addresses...
check out RFC 1166

[scratchONtheBOX]

127.9.0.3 <-- could be your local IP address in the lab.

127.0.0.1 <-- your local IP address at home.

AFAIK, pinging local IP addresses could have a "reply from [your local adress]..." reply.

You could read more info about TCP/IP Tools & Utilities here - ftp://ftp.rfc-editor.org/in-notes/fyi/fyi30.txt

and ping definition here - http://www.google.com/search?q=defin...en-US:official

Yo!

[foxyloxley]

yesterday wen i was jus pinging localhost..
instead of writing 127.0.0.1 i wrote 127.9.0.3
soo C:\>ping 127.9.0.3

Why did you type in the 'wrong' IP ?
What were you thinking of at that time ?

I'm in agreement on loopback, just curious as to why you typed it out wrong in the first place. Could it be something you were working on ?