Yes. You can use an existing network and run through a hub or router or you can use a "crossover" network cable and plug the computers together or use a wireless hub or router and connect both laptops that way.
There are also serial network solutions and many others. Just decide on which way you want to go then start figuring out how to do it.
Every PC connected to the internet has got a unique ip.
The role of the ethernet port on a PC is to allow internet to be connected. Without an ethernet port, there is no place for the computer to be connected to the internet.
WIFI can connect PC and laptop.
To connect to the internet via wifi you will need: A wifi enabled laptop/pc OR a wifi card/adapter. A wifi router/network with the internet connection connected to it. As long as your router is set-up correctly and your laptop is fairly new you shouldn't have any trouble connecting to the internet.
A PC is not involved in the use of the PS3. I don't even know how you would use the PC with a PS3. I have both and they are both connected to the internet. If you are asking how do you use a PS3 without internet and using the word PC for the internet it does not require the internet to use the PS3 it just gives the PS3 the ability to do more and to make sure the PS3 and the games have updates. Of course without the internet you can only play offline
Answer no of course not. you don't even have to know what a PC is to connect a PS3 to the internet and it is connected to the modem or router no it can be plugged in to the phone line PS3 can not be connected to the internet with dial up WIRELESS INTERNET
There are a variety of ways for connecting a standalone PC to another PC that is connected to the internet depending on the capabilities of the two computers. Examples are Ethernet and Wi-Fi.
Connect a router lead from your internet box (if you have one) to your laptop.
I'm preety sure no, are you using a App to connect it?
Yes, unless the owner of the PC blocks access, any users who are allowed to use a PC connected to the internet can share that internet connection.
The best way to connect your laptop to Internet when is already being used by your PC is to add a router. Depending on the router you select, you can then connect your laptop to the router or you can connect wirelessly. This will allow you to have more than one computer on the Internet at the same time.
The computer does not have to be connected to the internet at all for the port to be open, or listening.