Wireless Standards

Question 1

What are the two primary frequency bands used in wireless networks?

Answer 1

2.4 GHz and 5 GHz.

Question 2

What is the maximum theoretical speed of 802.11a?

Answer 2

54 Mbps.

Question 3

What frequency does 802.11a operate on?

Answer 3

5 GHz.

Question 4

What is the maximum theoretical speed of 802.11b?

Answer 4

11 Mbps.

Question 5

What frequency does 802.11b operate on?

Answer 5

2.4 GHz.

Question 6

What is the maximum theoretical speed of 802.11g?

Answer 6

54 Mbps.

Question 7

What frequency does 802.11g operate on?

Answer 7

2.4 GHz.

Question 8

What is the maximum theoretical speed of 802.11n?

Answer 8

600 Mbps with multiple streams.

Question 9

What frequencies does 802.11n operate on?

Answer 9

2.4 GHz and 5 GHz.

Question 10

What is the maximum theoretical speed of 802.11ac?

Answer 10

Up to 6.77 Gbps.

Question 11

What frequency does 802.11ac operate on?

Answer 11

5 GHz.

Question 12

What is the maximum theoretical speed of 802.11ax (Wi-Fi 6)?

Answer 12

Up to 9.6 Gbps.

Question 13

What frequencies does 802.11ax operate on?

Answer 13

2.4 GHz and 5 GHz.

Question 14

What is the range of 2.4 GHz Wi-Fi indoors?

Answer 14

Approximately 100-150 feet.

Question 15

What is the range of 5 GHz Wi-Fi indoors?

Answer 15

Approximately 50-75 feet.

Question 16

How many non-overlapping channels are available on the 2.4 GHz band?

Answer 16

3 (channels 1, 6, and 11).

Question 17

How many non-overlapping channels are available on the 5 GHz band?

Answer 17

Up to 24, depending on the country.

Question 18

What is the purpose of channel bonding in Wi-Fi?

Answer 18

To combine two channels for increased bandwidth.

Question 19

What is MIMO in wireless networking?

Answer 19

Multiple Input Multiple Output, a technology that uses multiple antennas for data streams.

Question 20

What is MU-MIMO?

Answer 20

Multi-User MIMO, which allows multiple devices to communicate simultaneously with the router.

Question 21

What is beamforming in wireless networking?

Answer 21

A technology that focuses Wi-Fi signals toward specific devices for improved performance.

Question 22

What is the maximum range of long-range fixed wireless systems?

Answer 22

Up to 40 miles with line of sight.

Question 23

What is the purpose of a wireless repeater?

Answer 23

To extend the range of a wireless network.

Question 24

What is the function of a wireless bridge?

Answer 24

To connect two separate networks over a wireless link.

Question 25

What is the purpose of a wireless access point (WAP)?

Answer 25

To allow wireless devices to connect to a wired network.

Question 26

What is the purpose of Wi-Fi Protected Access (WPA/WPA2)?

Answer 26

To secure wireless networks using encryption.

Question 27

What encryption protocol does WPA2 use?

Answer 27

AES (Advanced Encryption Standard).

Question 28

What is the benefit of Wi-Fi 6 (802.11ax)?

Answer 28

Improved efficiency, higher capacity, and better performance in dense environments.

Question 29

What is the difference between 802.11ac and 802.11ax?

Answer 29

802.11ax (Wi-Fi 6) supports both 2.4 GHz and 5 GHz, while 802.11ac is 5 GHz only.

Question 30

What is the purpose of DFS (Dynamic Frequency Selection) channels?

Answer 30

To avoid interference with radar systems in the 5 GHz band.

Question 31

What is the purpose of SSID in wireless networks?

Answer 31

To identify the network name for devices to connect to.

Question 32

What is the maximum number of streams supported by 802.11n?

Answer 32

4 spatial streams.

Question 33

What is the maximum number of streams supported by 802.11ac?

Answer 33

8 spatial streams.

Question 34

What is the purpose of an omnidirectional antenna?

Answer 34

To broadcast Wi-Fi signals in all directions.

Question 35

What is the purpose of a directional antenna?

Answer 35

To focus Wi-Fi signals in a specific direction for greater range.

Question 36

What is the purpose of wireless site surveys?

Answer 36

To determine the optimal placement of access points for coverage.

Question 37

What is the purpose of a mesh Wi-Fi system?

Answer 37

To provide seamless coverage by connecting multiple nodes.

Question 38

What is the purpose of 802.11r?

Answer 38

Fast roaming between access points for mobile devices.

Question 39

What is the purpose of 802.11k?

Answer 39

To improve client roaming and network performance.

Question 40

What is the purpose of 802.11v?

Answer 40

To optimize network resources and client device connectivity.

Question 41

What is the purpose of Wi-Fi Direct?

Answer 41

To allow peer-to-peer connections without a router.

Question 42

What is the maximum channel width for 802.11n?

Answer 42

40 MHz.

Question 43

What is the maximum channel width for 802.11ac?

Answer 43

160 MHz.

Question 44

What is the purpose of WPA3?

Answer 44

To provide stronger encryption and security for Wi-Fi networks.

Question 45

What is the difference between WPA2 and WPA3?

Answer 45

WPA3 uses more robust encryption and forward secrecy.

Question 46

What is the purpose of a captive portal?

Answer 46

To require authentication or agreement before accessing a Wi-Fi network.

Question 47

What is the purpose of a hotspot?

Answer 47

To provide internet access to devices via a Wi-Fi connection.

Question 48

What is the purpose of an SSID broadcast?

Answer 48

To make the wireless network visible to devices.

Question 49

What is Wi-Fi 6E?

Answer 49

An extension of Wi-Fi 6 that operates on the 6 GHz band for less interference.