WiFi support is the name of a wireless networking
technology that uses radio waves to provide wireless high-speed Internet and connections. Wi-Fi
networks have no physical wired connection between sender and receiver by using
radio frequency technology -- a frequency within the electromagnetic spectrum
associated with radio wave propagation. When an RF current is supplied to an
antenna, an electromagnetic field is created that then is able to propagate
through space.
Wi-Fi's
wavebands have relatively high absorption and work best for
line-of-sight use.
Many common obstructions such as walls, pillars, home appliances etc. may
greatly reduce range, but this also helps minimize interference between
different networks in crowded environments.
Wi-Fi
is potentially more vulnerable to attack than wired networks because anyone
within range of a network with a wireless
network interface controller can attempt access. To connect to a Wi-Fi
network, a user typically needs the network name .The
password is used to encrypt Wi-Fi packets so as to block eavesdroppers. Wi-Fi
Protected Access (WPA) is intended to protect information moving across Wi-Fi
networks and includes versions for personal and enterprise networks. Developing
security features of WPA have included stronger protections and new security
practices.
Wifi
support provides service in private homes, businesses, as well as in public
spaces. Wi-Fi hotspots may be set up either free-of-charge or commercially,
often using a captive
portal webpage for access. Organizations, enthusiasts, authorities and businesses,
such as airports, hotels, and restaurants, often provide free or paid-use
hotspots to attract customers, to provide services to promote business in
selected areas.