An IP address is a unique network-level identifier assigned to a network-enabled device.
IPv4 addresses are in the form X.X.X.X where each X is a number between 0 and 255.
Questions tagged [ip-address]
672 questions
384
votes
4 answers
Why does pinging 192.168.072 (only 2 dots) return a response from 192.168.0.58?
I mistakenly missed the dot off of an IP address and typed in 192.168.072.
To my surprise I connected to a machine at 192.168.0.58
If I ping 192.168.072 I get responses from 192.168.0.58.
Why is this?
I'm on a Windows PC on a Windows domain.
If I…
George Duckett
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337
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5 answers
What's the difference between 127.0.0.1 and 0.0.0.0?
I understand that 127.0.0.1 points to localhost, and so does 0.0.0.0 (correct me if I'm wrong). So, what's the difference between 127.0.0.1 and 0.0.0.0?
Sagnik Sarkar
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117
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7 answers
IP address that is the equivalent of /dev/null
Is there an IP address that would result in any packet sent to be ignored (blackholed)?
I know I can always set up a router with an IP address and then just have it ignore all packets sent to it, but does such a thing exist to save me the trouble?
Tyler Durden
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113
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6 answers
Why did the IETF specifically choose 192.168/16 to be a private IP address class?
Why did the Internet Engineering Task Force (IETF) choose 192.168/16 to be a private IP address classand not something else?
Why specifically 192.168/16 and 10/8 and 172.16/12 and not 145.243/16 for example?
Is there a reason those IP addresses were…
Cornbeetle
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74
votes
3 answers
Can someone please explain ifconfig output in Mac OS X?
When I do ifconfig on my Mac, I get a list of the following interfaces:
lo0
gif0
stf0
en0
fw0
en1
vmnet8
vmnet1
I wonder what each interface is. Also, which of these is the IP interface ? I don't see eth0 anywhere, which I assume is the standard…
euphoria83
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59
votes
2 answers
What is Windows command to convert machine name to ip address and vice versa?
I need to know the ip address of another machine in a lan network.
What is the Windows command for getting ip address from machine name and vice versa?
Bob
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57
votes
3 answers
What is the 127.0.0.2 IP address for?
I'm running the example in hiredis, which is using 127.0.0.2 as the Redis server IP, and it is running properly. Actually, the redis server is running on the same machine. I know that 127.0.0.1 is the IP address of lo, but how about 127.0.0.2? Is it…
ciphor
52
votes
2 answers
In a symlink pointing to '127.0.1.1:+xxxxx', what is the plus character for?
On my Linux filesystem, a symlink points to 127.0.1.1:+xxxxx.
Why the plus sign? Could there also be a minus? Why not just 127.0.1.1:xxxxx?
myMethod
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51
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15 answers
Fastest method to determine my PC's IP address (Windows)
This may seem trivial but I'm looking for the quickest method to determine my PC's IP address within my network.
This changes regularly as I connect from one network to the next via DHCP
The connection changes from wired to wireless
Windows 7 PC…
scunliffe
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43
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9 answers
How can I ping a range of IP addresses simultaneously
I have a bunch of machines on an IP address range which I want to ping simultaneously as a quick and dirty way of telling which ones are switched on. What (free) software can I use to do this?
I'm using Windows Vista.
Jon Cage
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41
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3 answers
Why is Windows' default IP address 169.xx.xx.xx?
My Windows system got an 169.xx.xx.xx IP address the other day, and I fixed the issue, but why did Microsoft chose this address as the default?
Why not 1.xx.xx.xx or 255.xx.xx.xx? Did one guy at Microsoft say
Hey, pick a number 1 to 255....who…
Adam
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41
votes
2 answers
How does a NAT server forward ping ICMP echo reply packets to users?
NAT uses an IP address port number combination to hash the outgoing requests. Since ping requests consist of ICMP echo request packets, they do not have any associated port number. How does a NAT server forward the replies to the hosts inside the…
Rohit Banga
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39
votes
2 answers
What does a forward slash followed by a number mean in IP?
If an IP Address is indicated like this: 10.39.25.151/24 , what does the /24 mean?
StackOverflowed
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6 answers
Why is there a difference between ping "localhost" and ping "local IP address"?
Using cmd and ping on Windows gave me the following results:
Pinging "localhost":
Pinging "192.168.0.10" (local IP address):
Aren't both situations exactly the same?
I mean, I'm pinging the same interface, the same machine and the same…
Diogo
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38
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10 answers
How can I make my IP address appear to be from another country?
How do I make it appear that my IP address is coming from one country while I'm located in another?
I live in Germany and some websites (like Hulu or Youtube) don't work because my IP isn't in the US. How do I get around this? Do I have to use a…
Brian