1101 2.3 Wireless Networking Protocols

Question 1

What frequency bands does the 802.11a standard operate on?

Answer 1

5GHz

Question 2

What is the maximum throughput of 802.11a?

Answer 2

54 megabits per second

Question 3

Which frequency range does the 802.11b standard utilize?

Answer 3

2.4GHz

Question 4

What is the maximum data transfer rate of 802.11b?

Answer 4

11 megabits per second

Question 5

How does 802.11g compare in speed to 802.11a?

Answer 5

Both have a maximum throughput of 54 megabits per second

Question 6

Which frequency does 802.11g operate on?

Answer 6

2.4GHz

Question 7

What new technology was introduced with 802.11n?

Answer 7

MIMO (Multiple Input Multiple Output)

Question 8

What are the two frequency bands that 802.11n can operate on?

Answer 8

Both 2.4GHz and 5GHz

Question 9

What is the maximum channel width in megahertz for 802.11n?

Answer 9

40 megahertz

Question 10

What does Wi-Fi 5 refer to in terms of IEEE 802.11 standards?

Answer 10

802.11ac

Question 11

Which frequency band does Wi-Fi 5 primarily operate on?

Answer 11

5GHz

Question 12

What maximum channel bandwidth does 802.11ac support?

Answer 12

160 megahertz

Question 13

What is the significance of MU-MIMO in 802.11ac?

Answer 13

It allows multiple users to communicate over multiple input and output streams simultaneously.

Question 14

How does the throughput of 802.11ax compare to that of 802.11ac?

Answer 14

802.11ax increases the maximum throughput to a total of 9.6 gigabits per second across all streams.

Question 15

What new feature does 802.11ax introduce to improve efficiency in dense environments?

Answer 15

OFDMA (Orthogonal Frequency Division Multiple Access)

Question 16

What are the regulatory considerations for setting up long-range fixed wireless networks?

Answer 16

Compliance with local and federal regulations regarding frequency use and signal power.

Question 17

What technology uses the ISM band in the 2.4 GHz frequency?

Answer 17

Bluetooth

Question 18

What is the typical communication range for consumer Bluetooth devices?

Answer 18

About 10 meters

Question 19

What does RFID stand for, and what is one common use?

Answer 19

Radio Frequency Identification, commonly used in access badges.

Question 20

What does NFC stand for, and how is it commonly used?

Answer 20

Near Field Communication, used for mobile payments and device pairing.

Question 21

What is the typical operational range of NFC?

Answer 21

A few centimeters, typically less than 10 centimeters.

Question 22

What are the legal requirements for installing an external antenna for long-range wireless communication?

Answer 22

Complying with safety standards, avoiding power sources, and protection against weather conditions like lightning.

Question 23

Which 802.11 standards operate in the 5GHz band?

Answer 23

802.11a, 802.11n (optionally), 802.11ac, 802.11ax

Question 24

Why might one choose 2.4GHz over 5GHz in a network setup?

Answer 24

2.4GHz provides longer range and better penetration through solid objects.

Question 25

What are some devices that could cause interference in the 2.4GHz frequency range?

Answer 25

Baby monitors, cordless phones, microwave ovens

Question 26

Why do 5GHz frequencies generally provide more available channels than 2.4GHz?

Answer 26

5GHz includes a broader spectrum and less interference from other devices.

Question 27

What is a Yagi antenna and in what scenario might it be used?

Answer 27

A directional antenna used for point-to-point connections over long distances.

Question 28

What does the term ‘unlicensed’ mean in the context of Bluetooth and 2.4GHz frequencies?

Answer 28

No special licensing from the government is required to use these frequencies.

Question 29

What is the primary advantage of using MU-MIMO in a network?

Answer 29

It improves network efficiency by allowing multiple devices to transmit data simultaneously.

Question 30

What challenges might arise when implementing wireless networks in a dense environment like a trade show?

Answer 30

Interference and decreased efficiency due to a high number of devices, which 802.11ax aims to mitigate.