wireless-world
Wi-Fi (short for "wireless fidelity") is a term for certain types of wireless local area network (WLAN) that use specifications in the 802.11 family.
The term Wi-Fi was created by an organization called the Wi-Fi
Alliance, which oversees tests that certify product interoperability. A
product that passes the alliance tests is given the label "Wi-Fi
certified" (a registered trademark).
Wi-Fi (Wireless Fidelity)
Wi-Fi (short for "wireless fidelity") is a term for certain types of wireless local area network (WLAN) that use specifications in the 802.11 family.
The term Wi-Fi was created by an organization called the Wi-Fi
Alliance, which oversees tests that certify product interoperability. A
product that passes the alliance tests is given the label "Wi-Fi
certified" (a registered trademark).
Originally,
Wi-Fi certification was applicable only to products using
the 802.11b standard.The 802.11 specifications are part of an evolving set
of wireless network standards known as the 802.11 family. new versions of Wi-Fi called successively 802.11b, 802.11g, 802.11n,
802.11ac, and so on. Each of these related standards can communicate
with each other, although newer versions offer better performance and
more features.The particular
specification under which a Wi-Fi network operates is called the
"flavor" of the network. A basic Wi-Fi network with one wireless access point reaches at most
only a few hundred feet (100m or less) in any direction. Expanding the
range of a Wi-Fi network requires installing additional access points
configured to communicate with each other, which becomes expensive and
difficult to support, especially outdoors. As with other wireless
protocols, signal interference (from other wireless devices, or from
physical obstructions such as walls) can lower the effective range of
Wi-Fi and its overall reliability.Wireless broadband routers
commonly used in home networks serve (along with their other functions)
as Wi-Fi access points. Similarly, public Wi-Fi hotspots utilize one or
more access points installed inside the coverage area.
Small Wi-Fi radios and antennas are embedded inside smartphones, laptops, printers, and many consumer gadgets enabling them to function as network clients. Access points are configured with network names that clients can discover when scanning the area for available networks.
Small Wi-Fi radios and antennas are embedded inside smartphones, laptops, printers, and many consumer gadgets enabling them to function as network clients. Access points are configured with network names that clients can discover when scanning the area for available networks.
Bluetooth and Wi-Fi are to some extent complementary in their
applications and usage. Wi-Fi is usually access point-centered, with an
asymmetrical client-server connection with all traffic routed through
the access point, while Bluetooth is usually symmetrical, between two
Bluetooth devices. Bluetooth serves well in simple applications where
two devices need to connect with minimal configuration like a button
press, as in headsets and remote controls, while Wi-Fi suits better in
applications where some degree of client configuration is possible and
high speeds are required, especially for network access through an
access node. However, Bluetooth access points do exist and ad-hoc
connections are possible with Wi-Fi though not as simply as with
Bluetooth
