Wireless network security is very essential issue that we should be very carefully applied while establishing a WiFi connection. Because wireless network is not connected through wires whereas we all know that it is connected through radio waves.These waves are shared in broadcasting manner. So people around your network having wireless card in their PCs can connect with your network without your permission in case your network is not secure.
So, if you want to secure your network, you have to provide a security key to your connection. There are many types of wireless network security. Two most common types that used mostly are Wired Equivalent Privacy (WEP) and WiFi Protected Access (WPA). These are used to prevent your computer from unauthorized access and control unauthorized access.
WEP is an old standard to provide wireless network security. It is least secure and can be cracked very easily. It was modified with WPA (WiFi Protected Access) in 2003.
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WiFi Protected Access provides better security with the help of an encrypted device which encrypts the network with a key. Your wireless network security improves as your wireless network security key being longer. You should be check security of wireless network to prevent unauthorized access.