FUNDAMENTALS OF COMPUTER

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TELECOMMUNICATIONS SYSTEMS

COMMUNICATION WIRELESS COMPUTING DEVICES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
____ is used with wireless devices that use the 5-GHz radio band and can achieve data rates as high as 54 Mbps
A
Direct sequencing
B
Access encryption
C
Frequency hopping
D
Orthogonal frequency-division multiplexing
Explanation: 

Detailed explanation-1: -IEEE 802.11a was the first version in the IEEE 802.11 series of Wi-Fi or Wireless Fidelity system. It defined a Wi-Fi format for providing wireless connectivity in the 5 GHz ISM band to give raw data speeds of up to 54Mbps.

Detailed explanation-2: -The 802.11a standard uses a frequency band of 5 GHz and has a maximum bandwidth of 54 Mbps.

Detailed explanation-3: -802.11n and 802.11ax can use either the 2.4 GHz or 5 GHz band; 802.11ac uses only the 5 GHz band.

Detailed explanation-4: -802.11a: Legacy 5 GHz Wi-Fi 802.11a supported the 5 GHz band and a theoretical maximum speed of 54 Mbps. In the early 2000s, many business/enterprise wireless devices used 802.11a Wi-Fi radios.

Detailed explanation-5: -The 802.11ac standard uses the 5 GHz frequency and supports data transmission speeds up to 1.3 Gbps. 802.11n supports data transmission speeds up to 600 Mbps.

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