2.3 Wireless Standards

Question 1

Which Wi-Fi standard operates only on the 5 GHz frequency and has a max speed of 54 Mbps?

Answer 1

802.11a.

Question 2

Which Wi-Fi standard operates only on the 2.4 GHz frequency and has a max speed of 11 Mbps?

Answer 2

802.11b.

Question 3

Which Wi-Fi standard improved upon 802.11b by increasing the speed to 54 Mbps while still using 2.4 GHz?

Answer 3

802.11g.

Question 4

What major feature was introduced with 802.11n (Wi-Fi 4)?

Answer 4

MIMO (Multiple Input Multiple Output) for multiple antennas.

Question 5

Which Wi-Fi standard operates on both 2.4 GHz and 5 GHz and supports speeds up to 600 Mbps?

Answer 5

802.11n (Wi-Fi 4).

Question 6

What major feature was introduced with 802.11ac (Wi-Fi 5)?

Answer 6

MU-MIMO (Multi-User Multiple Input Multiple Output).

Question 7

Which Wi-Fi standard operates only on 5 GHz and supports speeds up to 6.9 Gbps?

Answer 7

802.11ac (Wi-Fi 5).

Question 8

Which Wi-Fi standard supports 2.4 GHz, 5 GHz, and 6 GHz (Wi-Fi 6E) with speeds up to 9.6 Gbps?

Answer 8

802.11ax (Wi-Fi 6).

Question 9

Which Wi-Fi standards operate only on the 5 GHz frequency?

Answer 9

802.11a and 802.11ac.

Question 10

What is the benefit of using MIMO technology in wireless networks?

Answer 10

It improves data transmission by using multiple antennas.

Question 11

What is the difference between MIMO and MU-MIMO?

Answer 11

MIMO supports multiple antennas, while MU-MIMO allows multiple devices to communicate simultaneously.

Question 12

Which Wi-Fi standard introduced MU-MIMO for improved efficiency?

Answer 12

802.11ac (Wi-Fi 5).

Question 13

What is a common source of radio frequency interference (RFI) in the 2.4 GHz spectrum?

Answer 13

Microwaves, baby monitors, and cordless phones.

Question 14

How does Wi-Fi 6 (802.11ax) improve upon previous standards?

Answer 14

It offers higher efficiency, supports all Wi-Fi bands (2.4, 5, and 6 GHz), and provides better performance in crowded environments.

Question 15

Which Wi-Fi standard is fully backward compatible with all previous standards?

Answer 15

802.11ax (Wi-Fi 6).

Question 16

How can you reduce interference in a 2.4 GHz network?

Answer 16

Use non-overlapping channels (1, 6, and 11).

Question 17

What is the effect of physical barriers such as concrete walls on Wi-Fi signals?

Answer 17

They cause signal attenuation and reduce signal strength.

Question 18

What is channel bonding in 5 GHz networks?

Answer 18

Combining multiple channels (40 MHz, 80 MHz, 160 MHz) to increase data speeds.

Question 19

What is the downside of channel bonding?

Answer 19

It increases the risk of interference by reducing the number of available non-overlapping channels.

Question 20

Why do dual-band and tri-band routers improve Wi-Fi performance?

Answer 20

They allow devices to use both 2.4 GHz and 5 GHz, reducing congestion.