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Wireless transmission is divided into ___________

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Wireless transmission is divided into ___________

(a) 3 broad groups

(b) 6 broad groups

(c) 9 broad groups

(d) 8 broad groups

The question was posed to me in semester exam.

My question comes from TCP over Wireless topic in division Network Protocol of Wireless/Mobile

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Right answer is (a) 3 broad groups

The explanation is: We can divide wireless transmission into three broad groups: radio waves, microwaves, and infrared waves. Radio waves are used for multicast communications, such as AM and FM radio, television, maritime radio, cordless phones and paging systems. Microwave propagation is line-of-sight.

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