题目内容

What is the notable difference between Wi-Fi radio and other radios? ( ).

A. They transmit at frequencies of 2.4 GHz or 5 GHz.
B. They use 802.11 networking standards.
C. The spectrum that Wi-Fi used is not the same with other radio.
D. Wi-Fi radios can transmit on any of two frequency bands.

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Which one is one of the 802.11 networking standard? ( ) .

A. 802.11q
B. 802.11g
C. 802.11k
D. 802.11z

What is the characteristic of 802.11a ( ).

A. Transmits at 2.4 GHz
B. Transmits at 5 GHz
C. Is the slowest and least expensive standard
D. Is the most widely available of the standards

What is the characteristic of 802.11b ( ).

A. Is backward compatible with predecessors
B. Transmits at 5 GHz
C. Is the slowest and least expensive standard
D. Is the most widely available of the standards

What is the characteristic of 802.11g? ( ).

A. Uses Orthogonal Frequency-Division Multiplexing coding technique
B. Transmits at 5 GHz
Can achieve speeds as high as 140 megabits per second
D. Can transmit up to four streams of data

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