IP Address?

Is there a certain IP address to certain computers? I was experimenting and I took off the cable to my computer into the laptop but they had different IP addresses. I have a router hooked up to a modem. I kept doing this and I kept getting the same IP addresses from the same computer and on the laptop. (When I say this I mean that the laptop had the same IP address the whole time but it was different from the computers which was also the same the whole time) And is it possible that my computer and laptop both have different static IP addresses. If so, how?

Public Comments

1. Yes. Each computer must have its own unique IP address within a network. DHCP often gives computers the same IP address they had previously when their lease expires.
2. It could be due to MAC addresses. These are hardware specific numbers that are unique in the world.
3. yes each computer should have its own ip adress
4. they will have their own address so the router can identify them
5. Your Router or ISP that assigns the IP address automatically would attempt to use the same IP address to the same Network card that is connected again. It recognizes that card by it's unique MAC address that is PROGRAMMED into the card like a fingerprint. That's how DHCP services work. But you say STATIC IP address. That implies that NO DHCP server is involved in the IP address assignment. In that case, the router or gateway would have been manually programmed to recognize your computer and laptop individually by that STATIC IP address that you manually assigned. Maybe you are confusing this with the term Public IP address. You see, your Internet Provider has a bunch of these public IP addresses that it can assign temporarily. That address is assigned to your Modem/Router for your connection. Your router using Local Area network assigned IP addresses. These are in a range of 192.168.x.x. I'm not sure what your question really is, and what your intent is. If your Computer and Laptop are connected through a router to share a connection; that connection is only assigned ONE IP address up to your router from the internet. SO you are BUSTED. Good luck and Happy Computing!
6. The only way your computer and laptop would have different static IP addresses is if they are set to have static IP addresses. You can check this out by running the DOS command prompt and then typing in: ipconfig /all The above command will give you all the info on your network adapters. Chances are, your router is acting as a dhcp server (Dynamic Host Control Protocol) which means that it is assigning IP address dynamically. The router recognizes the MAC address of your computer and laptop and assigns the IP address to it.
7. You router has it's own IP address, that's why you get the same IP address for everything, although everything (usually) has it's own IP address.