Questions tagged [ip]
The IP (internet protocol) is a protocol for transmitting data over packets ("datagrams"). It is the primary protocol of the Internet. "IP" may also refer to an IP address, the numerical address assigned to an IP-capable device.
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Transatlantic ping faster than sending a pixel to the screen?
John Carmack tweeted,
I can send an IP packet to Europe faster than I can send a pixel to the screen. How f’d up is that?
And if this weren’t John Carmack, I’d file it under “the interwebs being ...
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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 ...
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How can I list all IPs in the connected network, through Terminal preferably?
Using Ubuntu 10.10 command line, how can I list all IPs connected to my home network?
Ideally, it needs to be a CLI command as I will be running it from C++.
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What is the exact use of a MAC address?
I understand that IP addresses are hierarchical, so that routers throughout the internet know which direction to forward a packet. With MAC addresses, there is no hierarchy, and thus packet forwarding ...
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Why can't I email myself at: [email protected]?
I opened cmd and typed ping gmail.com. It shows me:
C:\Windows\system32>ping gmail.com
Pinging gmail.com [74.125.235.55] with 32 bytes of data:
Reply from 74.125.235.55: bytes=32 time=6ms TTL=56
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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 ...
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Must TCP use IP?
Is it true that TCP is short for TCP/IP and they mean the same thing?
Is it possible for TCP to be built on top of another protocol besides IP?
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Why is localhost IP 127.0.0.1?
I wondered what is the origin of the decision to make localhost's IP address 127.0.0.1. What is the "meaning" of 127? what is the "meaning" of 0.0.1?
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Are IP addresses with and without leading zeroes the same?
I have a security system and the network setting only allows a three-digit IP address. I can't set it to 192.168.2.100, instead I have to use 192.168.002.100.
Are these two IP addresses different? Do ...
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Why does Qatar use a single IP address when 800,000 IP addresses are allocated to it?
In discussions about IP address banning, IP 82.148.97.69 is often cited as an example. According to Wikipedia, this IP address is the public address of "the entire nation of Qatar". There are two ...
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Windows command that returns external IP
Is there a command by which I can find my external IP of my router or my NAT\DSL Router, etc., eliminating the need to visit whatsmyip.net or similar.
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Can you grab any IP address on the Internet?
On a personal network (LAN) one can simply grab an IP address. If you choose the same IP address as an existing client, you get problems. There are companies like IANA and ICANN that are in charge of ...
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Do servers hold one website only?
As from what I understand the DNS link the domain name with the IP address of the server the website is stored on, does that mean each server can only hold one website? If they don't, how does calling ...
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Do two computers connected on the same Wi-Fi have the same IP address?
Do two computers connected on the same Wi-Fi have the same IP address (for example, my dad's computer and my computer, at home)?
If so, how does the outside world distinguishes one computer with the ...
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How can I own an IP address?
How can I own an IP address like I do with domains?
I have done some research and it seems that you can't buy a single IP, but rather you have to purchase a range of IP addresses.
Update : Important ...
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How do web servers know whether you're using direct IP address access?
Some web servers, when accessed using their IP address, return an error that direct IP address access is not allowed.
I've been wondering for some time how this works. I mean, doesn't the browser ...
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Is it possible for many domain names to share one IP address?
Is it possible for many domain names to share one IP address? For example, www.xjtl.com, www.fmie.com, sdmfl.com, etc.
Hundreds of domain names share just one IP – when you do a DNS query for each of ...
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Windows command to display all IP addresses
I know there is a single line of a command and its arguments that can help display all computer IP addresses (those that are being used) on a LAN, and my computer is also a client, as one of those ...
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Why are subnet-masks relevant for the individual computer on the network?
I understand how subnet-masks are used to divide a network into sub-networks, but, why does every computer in the network need to know the subnet-mask and not just the router?
I could understand it, ...
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How to find the IP Address of a VM running on VMware (or other methods of using VM)
I am running VMware Workstation on a Linux box.
When I power on a centOS (Linux) virtual machine I cannot get mouse or keyboard control of the machine. I suspect that it has something to do with the ...
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Why do we need subnet mask?
Since a IPv4 address already gives the information of the network and and host, why do we still need a subnet mask?
The 1st Octet already specify the network class (1-127: A, 128-191: B, 192-223: C ...
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What does a forward slash followed by a number mean in IP? [duplicate]
If an IP Address is indicated like this: 10.39.25.151/24 , what does the /24 mean?
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Possible to "ping" url:port? (OS X-GeekTool)
I'm trying to use GeekTool (Mac pref pane... basically just embeds output of a shell command/script on the desktop... http://lifehacker.com/#!244026/geek-to-live--monitor-your-mac-and-more-with-...
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Find an unknown static IP + subnet mask of device?
I have a device set with a static IP and subnet mask. I do not know the IP or subnet mask. How can I find the devices IP and subnet mask?
It is a piece of hardware, not a PC. It will not take an IP ...
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How does my router resolve a URL like http://router.asus.com/ to its IP address?
Typically I connect to my router by its IP address of 192.168.1.1. However, I am also able to connect to it at the URL router.asus.com. My computer does not have a connection to the Internet. How ...
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How can I get my public IP address from the command line, if I am behind a router?
Is there a way for me to get my public (WAN) IP address on the command line? I am behind a router (LAN network), with a dynamic IP address assigned by my ISP.
I have seen solutions using an external ...
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How to route only specific subnet (source ip) to a particular interface?
How to route only specific subnet (source ip) to a particular interface?
OS: Linux
I know I can do easily by destination IP by using something like
route add 1.2.3.4/24 dev eth4
but I do not ...
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How does bridged networking work in Virtualbox?
How does bridged networking work?
I have looked through the VirtualBox manuals but nothing extremely technical came up (It was just a generic gloss over of the topic).
How does it assign a ...
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Services that just return your public IP as text [closed]
I'm writing a script that does dynamic DNS updates for me, but my server is behind a router, and so I need to use a web service to determine my public IP.
So far I've found this one which returns ...
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What keeps you from changing your public IP address and wreaking havok?
An interesting question was asked of me and I did not know what to answer. So I'll ask here.
Let's say I subscribed to an ISP and I'm using cable internet access. The ISP gives me a public IP address ...
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How to find my DNS Server address in Windows 7
What is the easiest way to know my current DNS server's IP address or domain name? I am trying to troubleshoot my broadband Internet connection under Windows 7.
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On Windows, how to determine route for IP destination?
How can I determine the IP route taken for a specific IP destination (without looking at "route print" and figuring it out manually)?
In OS X there's route get 1.2.34 and in Linux there's /sbin/ip ...
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Why does the registered domain name “localtest.me” resolve to 127.0.0.1?
I was reading an article about Server-Side Request Forgery. In that article the attacker found that 127.0.0.1 was open to the internet. The victim then blocked 127.0.0.1, but because many other IPs ...
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What does /16,/24 mean with regards to ip addresses?
I am trying to understand how network topologies work in large scale networks such as college campuses.
I often see the phrases /16,/24 with regards to ip addresses.
I would like to know what /16 ...
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How can every single device on a network have a different public IP?
I'm at a computer camp, and I noticed that every single device connected to the network has a different public IP, which really surprised me. What is even more strange is that their public IPs are ...
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Add a static IP alias to a DHCP interface on Windows 8 (and above)
I have a Windows 8 machine that has only a single Ethernet port. It needs to use DHCP and also needs a static IP. Each IP is in a different subnet, and each serves a different, incompatible purpose.
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IP address: 000 simplifies to 0?
I was setting up my Ubuntu with brother printer driver and was trying to use my printer's IP to connect my pc to the printer.
On my printer, the IP address is 192.168.000.008. So I entered this in my ...
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Why can a network address not be a valid host address?
So... I have studied for CCNA and such and been working with IP networking at the least the past 8 years or so. I have always seen and been told that the network address for a subnet is not a valid ...
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Is it possible to host a web server from behind a NAT
My PC is behind a NAT router that has a public IP address. If I want to host a website then I believe I need a domain name which I can purchase from some site which would pledge to resolve all DNS ...
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Ethernet vs TCP vs IP?
What is the difference between Ethernet, TCP, and IP in simple (simple abstract) terms?
Please do not copy from Wikipedia...
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Why can I ping 10.0.0.0/8 addresses from a 192.168.1.0/24 subnet?
My home network uses a 192.168.1.0/24 subnet, and when I ping 192.168.1.137 I get a response saying the host is unavailable (as expected because I don't have any machines using that address)
However, ...
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How do IP answer packets reach their destination inside of a private LAN? [duplicate]
This is a little theory question that has been confusing me for a pretty long time.
Basically, if we are inside of a private LAN, and we want incoming packets to reach, for example, an HTTP server ...
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Are subnets always contiguous 1s? [duplicate]
I understand the basic premise behind subnet masks, such as 255.255.255.0. But all the subnet examples I’ve seen have been (from left-to-right) contiguous 1s (HI bits). For instance, 255.255.0.0 (/16) ...
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What is the difference between a subnet mask and a netmask?
Is there any logic in using two different names for determining host ID and net ID?
For example, if you type print route in a Command Prompt you get things with netmask, but the IPv4 settings seems ...
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Does the order of entries in the routing table matter?
Does the routing order matter:
> route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
123.x.x.151 0.0.0.0 255.255.255.255 UH ...
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Why does searching "0.693" bring me to "0.0.2.181"? [duplicate]
While working on math, I encountered a number and wondered if it had any significance. So, in the browser search bar I entered it ("0.693"). I got redirected to the IP address 0.0.2.181, which ...
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Wrong IP address from DHCP client on Ubuntu 18.04
I'm experiencing a weird issue where my Ubuntu 18.04 (server) box gets issued a wrong IP address during boot from the DHCP server. Running dhclient after boot on the interface results in the right IP ...
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How can I connect via SSH (Putty) to my VMWare machine (Ubuntu)?
I'm trying to connect to my VMWare (Workstation 7.1.3) machine (Ubuntu Lucid) via SSH. I've read through some other posts, but I can't figure this out. I ran ifconfig, and got a inet addr: and Bcast ...
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How many characters can an IP address be?
I have to create a field in a mysql table to store ip addresses. I need to know the maximum characters an ip address can possibly be. Whether ipv4, ipv6 or some other type that can render a valid ip ...
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How do I find out which program and process ID accesses a given IP address in Windows?
Is it possible to catch, which program is accessing a specific IP address?
I found my computer is flooding and wish to check addresses one by one.
May be it is possible to set up some audit for ...
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