HOW WI-FI WORKS:

SYSTEM SUPPORT:
For a system to connect to a Wi-Fi
network, it should have a Wi-Fi card, or an
access point connected to it. Wi-Fi network cards
are like normal network cards that plug into PCI
slots, but have a protruding antenna. It’s also
possible to plug an external Wi-Fi adapter into a
USB port. Once network card are installed and
configured, the system can connect to any Wi-Fi
network.
PROS:
Given the current situation, Wi-Fi
should be adopted when there is a demand for
High speed on the move. Wi-Fi is suited for
corporate with several executives roaming
around the office with their laptops. Home
looking for a means to share a broad band
internet connection can also consider adopting
Wi-Fi.
CONS:
A wireless setup is rather expensive
when compared to a regular LAN. Also since
Wi-Fi drains batteries much quicker, PDA users
should avoid using it-especially if they have a
Bluetooth option available. It is difficult to
provide Wi-Fi network, as it is difficult to
control access to the network.
DEVICE USING WI-FI:
While Wi-Fi may be widely used for
communication between computers, there are
PDAs that support it. It’s also possible to add
Wi-Fi support to a PDA by inserting a Wi-Fi
card in to the SD (secure Digital) slot. PDA such
as the Toshiba e750 have inbuilt support for Wi-
Fi. Nokia announced plans to build mobile
phones that can seamlessly switch between
802.11b and public networks. The major
problem with Wi-Fi is the high power
consumption, which mobile devices just can’t
afford.