Wireless Techologies

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802.11
       - It is a wireless LAN that controls the transmission of user data into the physical layer
       Example
-                     WI-FI



Infrared
-       It is a region of electromagnetic radiation spectrum where wavelength range from about 700 nanometers to 1 millimeter

How infrared works?
-       By send out pulses of infrared light that represents specific binary codes.
Example
-       Smartphone, remote control


Bluetooth
-       It is a wireless technology that allow devices to communicate or to send data or voice, wirelessly over a short range distance

How Bluetooth works?
-       By communicate with each other using a radio signals and infrared light beams

Example
-       Connect to other mobile phone to send media



3G
-       3G is the third generation of wireless technologies, like high-speed transmission, advanced multimedia access, and global roaming.

Example
-       Mobile phones


The differences between the various types of 802.11

            802.11b
            - Lowest cost, signal range is good and not easily obstructed          
            802.11g
            - Fast maximum speed, signal range is good and not easily obstructed
            802.11n
            - Fastest maximum speed and best signal range and more resistant to signal   interference from outside sources


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