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