My IP address to the internet is the same on every computer how does the internet know which computer to go to

Question

yes the modem IP address, so it send the information back to the Modem IP address. from there how does it know which computer to go to?

Answer 1

If all the computers are connected to a router then no way do they have the same IP. Your internet IP, the one given to your modem from the service provide will be the same, but your local IP addresses on each computer will be different.

To the Internet your IP address will look the same because the service provider talks directly to your router.

The router then sends the correct info to the computers local IP address.

Answer 2

think ur getting confused between ip addresses an the pc s cant have the same ip as windows would throw up the invalid ip error and tell u there has been a conflict so i think ur looking at ur modems ip mayb as there is an ip for each pc an then u have one for the modem an then an external ip that connects to the net

Answer 3

You will have one IP address which is determined by your ISP and is used to get information from the internet to your router, then each computer has a unquie MAC address on the Network Interface Card, which is like the IP address for each computer.

Answer 4

It's thanks to a wonderful thing called NAT..

That's Network Address Translation. Your PC will have an IP address of something like 192.168.1.100 on your LOCAL network, other PCs will be 192.168.1.101, 102, 103 etc.

There will be a box between you and the Internet called a router, this is effectively another computer whose sole job is to keep track of how you connect to the internet (or any other network).

When you access the 'Net, the router see's your request going out and substitutes your address (192.168.1.100) for one of it's own addresses (Maybe 203.100.100.1).

It also adds on another number at the end called a port number.

So, anyone on the Internet will see you as being on IP address 203.100.100.1

If they've got some really clever software, they can tell what your port number is and see you as 203.100.100.1:465 (<-- Your port No.)

When the web-site replies to you, it sends a message back to your router, which looks up your port number in a table, decodes it, finds out your real, local network address (192.168.1.100) and displays the Webpage..

Simple..

Answer 5

Are you using a router ? If yes, then the router who decide different IP for each computer.

Answer 6

but your computers IP address is different.

Answer 7

your m/c has local ip then request goes to your proxy (if installed) then proxy gives a port number to every request ... and when data comes from server it comes to your internet ip and port number and that port number is maped to your locl computer ip and port and hence it goes to your local computer port .... and you computer now nows to which application data should be sent('coz port is mapped with your applications)