Yes, you can.
A wireless router allows users to connect wirelessly to the Internet when they are within a specific range. A USB wireless router does the same thing except it uses the USB port of the computer to connect to the wireless router an Internet.
If you want to use internet wirelessly, yes you need a wireless router and a wireless adapter for your PC (usually laptops have it).
There is no internet piece to put on the PlayStation 3. Out of the box the PS3 can connect to the internet both wired and wirelessly. To use the wireless you must have a wireless internet connection though.
Your PS3 must have a wireless adapter installed if you want to connect to the internet wirelessly. Otherwise, if you don't you will have to use an Ethernet cable. If you have a wireless adapter installed on your PS3. You will need to connect it to your wireless router. Go to the wireless network menu on your PS3. Find the (SSID) network name of your network. Connect to it!
There are tons of reasons. Most common are secured wireless is enabled, MAC table is enabled, your wireless adapter is not compatible with your wireless router, wireless router does not work properly and so on.
in general, no. however, it is possible if the computer connected to the internet has a second wireless card installed. then you would set the second card into ad-hoc mode and activate internet sharing.
PS3 has the ability to have a wireless connection or a wired connection to the internet. It does not have wireless internet, you must purchase a broadband internet service. Many people already have broadband internet service for a PC and need a router to allow them to connect the PS3. A router will allow two or more items to be connected to the internet service. A wireless router will allow them to connect wirelessly if they both have a wireless connection capability like the PS3 and also allow them to be connected with an ethernet cable for a wired connection.
Most commonly in houses there is a wired connection from the ISP to the wireless access point. The computers in the house are wirelessly connected to the wireless access point. Having said that, access points that make use of 3G cellphone networks or WiMax do connect wirelessly to the internet. But that is not common yet.
Just get a wireless 802.11 adapter for the laptop to connect to the internet.
A router and the modem that will hook up to that router so it can provide the internet. Or you can wirelessly connect to the modem with Wi-Fi. You can also use a dongle for on-the-go internet.
Yes you can
All PS3 but the first 20 GB model are wireless. That means if you already have a wireless internet connection they can connect to it.