A wireless device can refer to any kind of communications equipment that does not require a physical wire for relaying information to another device. Wireless headphones fitted with a receiver use either radio frequency (RF) or infrared technology to communicate with a transmitter that is connected to the sound source.
In order to join a wireless LAN, a computer must have a wireless network card or adapter installed. A network card is an internal wireless device manufactured to use the same language or protocol that wireless routers use. If a router uses a protocol that is not supported by an internal wireless device, an external wireless adapter can be used in an external port. The most common type is a USB dongle, but wireless network adapters are also available in Express Card formats, giving laptop users a choice as to which port they would rather use.
A device that can use Wi-Fi can connect to a network resource such as the Internet via a wireless network access point. An optional feature added in 2007, called Wi-Fi Protected Setup (WPS), had a serious flaw that allowed an attacker to recover the router's password.The Wi-Fi Alliance has since updated its test plan and certification program to ensure all newly certified devices resist attacks. The use of WPS greatly reduces the time required to gain access by the use of so called "brute force" attacks.
In order to join a wireless LAN, a computer must have a wireless network card or adapter installed. A network card is an internal wireless device manufactured to use the same language or protocol that wireless routers use. If a router uses a protocol that is not supported by an internal wireless device, an external wireless adapter can be used in an external port. The most common type is a USB dongle, but wireless network adapters are also available in Express Card formats, giving laptop users a choice as to which port they would rather use.
A device that can use Wi-Fi can connect to a network resource such as the Internet via a wireless network access point. An optional feature added in 2007, called Wi-Fi Protected Setup (WPS), had a serious flaw that allowed an attacker to recover the router's password.The Wi-Fi Alliance has since updated its test plan and certification program to ensure all newly certified devices resist attacks. The use of WPS greatly reduces the time required to gain access by the use of so called "brute force" attacks.
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