A Brief Introduction About Wi-Fi:
Wi-Fi is a popular wireless networking
technology. Wi-Fi stands for “wireless fidelity”. The Wi-Fi was invented
by NCR corporation/AT&T in Netherlands in 1991. By using this
technology we can exchange the information between two or more devices.
Wi-Fi has been developed for mobile computing devices, such has laptops,
but it is now extensively using for mobile applications and consumer
electronics like televisions, DVD players and digital cameras. There
should be two possibilities in communicating with the Wi-Fi connection
that may be through access point to the client connection or client to
client connection. Wi-Fi is a one type of wireless technology. It is
commonly called as wireless LAN (local area network). Wi-Fi allows local
area networks to operate without cable and wiring. It is making popular
choice for home and business networks. A computer’s wireless adaptor
transfers the data into a radio signal and transfers the data into
antenna for users.
WIFI Technology
Working Principle:
Wi-Fi is a high speed internet
connection and network connection without use of any cables or wires.
The wireless network is operating three essential elements that are
radio signals, antenna and router. The radio waves are keys which make
the Wi-Fi networking possible. The computers and cell phones are ready
with Wi-Fi cards. Wi-Fi compatibility has been using a new creation to
constituent within the ground connected with community network. The
actual broadcast is connected with in sequence in fact it is completed
by way of stereo system surf as well as the worth of wires with monitor
to classification prone. Wi-Fi allows the person in order to get access
to web any place in the actual provided area. You can now generate a
system within Resorts, library, schools, colleges, campus, personal
institutes, as well as espresso stores as well as on the open public
spot to help to make your company much more lucrative as well as
interact with their own customer whenever. Wi-Fi compatibility can make
surf with stare to company using their inspiring cable television much a
smaller amount force down.
The radio signals are transmitted from
antennas and routers that signals are picked up by Wi-Fi receivers, such
has computers and cell phones that are ready with Wi-Fi cards. Whenever
the computer receives the signals with in the range of 100-150 feet for
router it connect the device immediately. The range of the Wi-Fi is
depends upon the environment, indoor or outdoor ranges. The Wi-Fi cards
will read the signals and create an internet connection between user and
network. The speed of the device using Wi-Fi connection increases as
the computer gets closer to the main source and speed is decreases
computer gets further away.
WI-FI Connections
Many new laptops, mobile phones have
inbuilt Wi-Fi card you don’t have to do any thing which is one of the
best thing. If it is a free- based type of network connection the user
will be promoted with a login id and password. The free base network
connections also well in some areas. The Wi-Fi network connection is
creating hot spots in the cities. The hot spots are a connection point
of Wi-Fi network. It is a small box that is hardwired in to the
internet. There are many Wi-Fi hot spots available in public places like
restaurants, airports, and hotels offices, universities etc.
Security:
Security is impartment element in the
Wi-Fi technology. Security is our personal decision but having a
wireless connection we should pay attention to protect our private
details. We can connect easily to unsecured wireless routers. The
problem is any one is connected to your wire less router using the data
like download games, download apps and planning terrorist activities,
shirring illegal music and movie files etc. So it is necessary to
provide security to the wireless technologies based devices.
How to make the Security?Types of WI-FI Technologies:
Currently they are four major types of WIFI technologies.- Wi-Fi-802.11a
- Wi-Fi-802.11b
- Wi-Fi-802.11g
- Wi-Fi-802.11n
802.11a is the one of a series of
wireless technology. That defines the format and structure of the radio
signals sent out by WI-FI networking routers and antennas.
Wi-Fi-802.11b:
802.11b is the one of a series of
wireless technology. 802. 11b support bandwidth 11mbps. Signal in
unregulated frequency spectrum around 2.4 GHz. This is a low frequency
compared with Wi-Fi-802.11a means it is working reasonable distance. It
is interference with micro owns cordless phones and other appliance. It
is low-cost; signal range is good using home appliance.
Wi-Fi-802.11g:
In 2002 and 2003, This Technology
supporting a newer slandered products. It is best technology of 802.11a
and 802.11b. The 802.11 b support bandwidth upto 54mbps and it use a 2.4
GHz frequency for greater range. This cost is more than 802.11b. It is
fast accessing and maximum speed.
Wi-Fi-802.11n:
The 802.11n is the newest WIFI
technology. It was designed to improve on 802.11g .The amount of
bandwidth supported by utilizing multiple wireless signals and antennas
instead of one. It supports 100 mbps bandwidth and increased signal
intensity.
Applications:
- Mobile applications
- Business applications
- Home applications
- Computerized application
- Automotive segment
- Browsing internet
- Video conference
- Wireless laptop can be moved from one place to another place
- Wi-Fi network communication devices without wire can reduce the cost of wires.
- Wi-Fi setup and configuration is easy than cabling process
- It is completely safe and it will not interfere with any network
- We can also connect internet via hot spots
- We can connect internet wirelessly
- Wi-Fi generates radiations which can harm the human health
- We must disconnect the Wi-Fi connection whenever we are not using the server
- There are some limits to transfer the data, we cant able to transfer the data for long distance
- Wi-Fi implementation is very expensive when compared to the wired connection
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