Me and my sister dont have the same IPv4 even though we are on the same WiFi. Can anyone tell me why?
What you are asking is normal. Each device that's used with the same network is going to have a different internal IP address, and every device that's used on a network should have the same external IP address.
Because the IP is your computers address on the network. You will be on the same "subnet" but your addresses HAVE to be different for the network protocols to work!
Hmm... I liked the "Package" analogy, it just didn't go far enough for me. Imagine someone wants to send your sister a package. They need to know at least 2 things: - Your family's home address - Your sister's name (so the right family member "opens" the package) This is very similar to how info gets to your home network devices. - Your router's PUBLIC IP is like your home address! That's where data is sent. - Your sister's PRIVATE IP address is like her name! This lets your router know whether to send the "package" to you or to your sister's device. That's why you have a different (private) IP address than your sister.
Your computers will have two IP addresses. A private address on your internal private network and a public address that is used on the Internet. Each device on your private network must have a unique IP address on that network so that incoming data can be directed to the correct computer. This address is used when your device sends data to identify which device is sending the data. Your router has a Network Address Translation function that allows all your devices on your private network to share a single IP address on the Internet. You can find this address by going to: http://www.whatismyip.com Each device on your private network should show the same public address using this or a similar URL in an Internet browser. I hope this helps.
it would be bad if you did. your IP is like a phone #. if you both had the same number, your router would not know where to send internet traffic. the only number both computers should have in common is the Gateway IP. the is your router's "phone number".
Master Of Puppets
You're not supposed to have the same IP address on multiple devices. Think of it this way. If you want to send a package or letter to a friend, you have to have his/her street address. The IP address is essentially the virtual equivalent of a street address. Each person has to have a unique street address otherwise packages wouldn't be able to be sent to the correct address. In much the same way, each device has to have a unique IP address otherwise packets (pieces of data) would mixed up and sent to the wrong devices.