CompTIA A+ Certification Core 1 (220-1101) - Wi-Fi Standards

The video tutorial covers the evolution of the 802.11 wireless networking standards, explaining the original standard and its various extensions like 802.11a, b, g, n, and ac. It discusses the use of ISM bands, specifically the 2.4 GHz and 5 GHz bands, and the concept of channels to avoid interference. The tutorial also highlights the importance of backward compatibility and introduces MIMO technology. Finally, it touches on the Wi-Fi Alliance's new terminology for these standards, such as Wi-Fi 4 and Wi-Fi 5.

What is the primary reason for the development of 802.11 extensions?

• To increase the range of wireless networks

• To support newer technologies and faster speeds

• To make wireless networks more secure

• To reduce the cost of wireless devices

Why are different frequency bands used in 802.11 standards?

• To reduce interference between devices

• To allow for more simultaneous users

• To simplify the setup process

• To increase the power of wireless signals

How many channels are available in the 2.4 GHz band in the United States?

• 14

• 10

• 13

• 11

Which 802.11 extension was the first to operate on the 5 GHz band?

• 802.11g

• 802.11a

• 802.11b

• 802.11n

What is a key feature of 802.11n that enhances its performance?

• Exclusive use of the 2.4 GHz band

• MIMO technology

• Single antenna technology

• Backward compatibility with 802.11a only

What does MU-MIMO in 802.11ac allow?

• Multiple users to connect at the same time

• Simplified network configuration

• Increased range of the wireless network

• Faster data transfer rates for a single user

What is the new terminology introduced by the Wi-Fi Alliance for 802.11 standards?

• Wi-Fi 1, 2, 3

• Wi-Fi X, Y, Z

• Wi-Fi A, B, C

• Wi-Fi 4, 5, 6