Advantages of WiFi: WiFi is really fast i.e provides 11 Mbps speed, it is reliable has a long range (up to 1000 ft outdoors, 400 ft indoors) and has easy integration to wired networks.
It is also compatible with original 802.11 DSSS standards.
Disadvantages of WiFi: The speed may fluctuate in the case of interference, the speed drops in halves (11 Mbps to 5.5 Mbps to 2 Mbps to 1 Mbps).
Advantages of Bluetooth: Bluetooth is free of cost and has secure connection and secure data transfer and is really simple to use.
Disadvantages of Bluetooth: Bluetooth has low data transfer rate, slow connection and extended power usage.
Advantages of Infrared: IR is highly secure and has high noise immunity. It is simple to use and has low circuitry cost, it also has low power requirement.
Disadvantages of Infrared: Infrared only works on the principle of line of sight and has a short range. It is light and weather sensitive ans has low speed.
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