it is a wireless lan card
No. The USB connection will be used to pass the data, not a LAN card.
You can replace your LAN port with a wireless card if you have an ASUS P9X79 motherboard. However, it's a better idea to get a card that fits in a USB port so you can keep your LAN port.
This is an 802.11b WiFi modem in your computer
it takes your internet connection and converts it to a wireless signal which can be picked up by any computer with a wireless lan card installed.
An AGP card is a graphics or display card and will allow output to a monitor. A LAN card is a Network Interface Card which allows a computer to communicate over a network, either wired or wireless.
Yes you can. And it depends what you mean a secondary card. But before you have to find out why your wireless does not work. If might happen that you have wrong settings for it or you have turned it off accidentally (some laptops have a switcher for wireless). If you are sure that the wireless adapter was broken you can purchase an usb wireless adapter (secondary card) which might cost you about $20-50 and more (depending on brand and performance). If you mean a secondary card a lan port then you need a lan cable and non-occupied lan port in your wireless router.
No, it doesn't. It has a built in Intel network adapter and a modem card, but no wireless LAN.
working principle of wireless lan
If you mean, "What is a wireless LAN?" The answer is simple. A wireless LAN is a network that connects multiple computers, gaming consoles, and gaming devices and allows them to connect to the internet, but only if they are capable of using wireless. Wireless LAN is achieved by using a wireless router. LAN stands for Local Area Network.
Wake on Wireless LAN
On top of your PSP is an switch for wireless lan. Just switch it.
range and security (802.11n Wireless LAN)