The Internet connection is the gateway to a world of information, but it's an open door, where you can get out but also where you can enter. Therefore thought always come to my mind that, as one can find information through the network, others may use the same network to find information about you. Viruses, trojans and keyloggers are able to monitor computer use and transmit sensitive information such as credit card numbers and passwords, adds some more troubles. Using a wireless security becomes even more important because those who gain access to the network can use, free to carry out illegal activities without the owner's knowledge. So please tell me how to protect Wireless Network from Hacker?