Which option describes why most wireless phones and tablets do not use 802.11a/n and 40 MHz
channels?
A.
a lack of radio range when using these radios
B.
a lack of device battery capacity to operate concurrent a/b/g/n radios
C.
a lack of cooling in the device necessary to operate these radios
D.
These radios would require the devices to be larger.
a/b/g/n
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Wireless A, first introduced in October of 1999, was the first wireless model available to the public. It had a maximum bit rate of 54 Mbit/s and could only go 100 feet before the signal was lost.
Also released in 1999 was Wireless B. This had a really slow bit rate at a maximum of 11 Mbit/s, but what you lost in speed you gained with distance and you could go about 150 feet.
After that came Wireless G. Like Wireless A, it had a maximum bit rate of 54 Mbit/s, but you could also get the distance of Wireless B’s 150 feet. Most modern (as of this writing) wireless households have Wireless G; it’s currently the most common type of wireless router throughout the world.
Wireless N is the relatively new kid on the block. This is next gen wireless and has a maximum bit rate of 74 Mbit/s and can go about 230 feet. It’s also said that Wireless N travels at a higher frequency and can go through solid objects faster. Instead of running on a 2.4 GHz network like Wireless A, B, and G, it travels on a 5 GHz network.
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abgn
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