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The ability to enter a network while mobile has great benefits.However, wireless networking is prone to some security issues.

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Wireless security is the prevention of unauthorized access or damage to computers using wireless networks.

The most common types of wireless security are Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA). The password it uses can often be cracked in a few minutes with a basic laptop computer and widely available software tools.

Enterprises often enforce security using a certificate based system to authenticate the connecting device, following the standard 802.1X.

Many laptop computers have wireless cards pre-installed.

Such "piggybacking" is usually achieved without the wireless network operator's knowledge; it may even be without the knowledge of the intruding user if their computer automatically selects a nearby unsecured wireless network to use as an access point. If an employee (trusted entity) brings in a wireless router and plugs it into an unsecured switchport, the entire network can be exposed to anyone within range of the signals.