Answer : Requirement Wireless communication system is essential for communication in places where cable or cable based communication is not possible. Wireless means must be used , especially for portable devices (laptops , computers , mobile phones , smartphones , tablet computers) to reap the benefits of technological advancement. Connectivity when thinking of productivity is a complex and troublesome process for the user . In the case of wireless communication systems, on the other hand, if the user's communication device is wireless supported , the complications are rare. Wireless communication systems enable communication or data transfer between short or long distance locations. In that case you have to select the wireless medium according to the distance. Such as 1. Radio Frequency Communication II. Microwave communication 3. Infrared short range communication