2.2 wireless network technologies

Question 1

What does IEEE 802.11 define?

Answer 1

Wireless networking standards used for Wi-Fi.

These standards are essential for establishing Wi-Fi networks.

Question 2

Why did Wi-Fi naming change from 802.11ax to Wi-Fi 6?

Answer 2

To simplify understanding and make standards easier to identify for consumers.

This change helps users recognize different generations of Wi-Fi technology.

Question 3

What is Wi-Fi 6 an example of?

Answer 3

A Wi-Fi generation name corresponding to an 802.11 standard.

It represents advancements in wireless technology.

Question 4

What frequency bands are commonly used by Wi-Fi?

Answer 4

• 2.4 GHz
• 5 GHz
• 6 GHz

These bands are utilized for different purposes and performance characteristics.

Question 5

Why does Wi-Fi use channels?

Answer 5

To organize frequencies and reduce interference between networks.

Channels help maintain stable connections in crowded environments.

Question 6

Which Wi-Fi frequency band has the longest range?

Answer 6

2.4 GHz.

This band is better at penetrating walls and obstacles.

Question 7

Which Wi-Fi frequency bands offer higher speeds and less interference?

Answer 7

• 5 GHz
• 6 GHz

These bands are ideal for high-speed internet access.

Question 8

What does Wi-Fi channel bandwidth refer to?

Answer 8

The width of the channel, which affects data throughput and performance.

Wider channels can provide faster data rates.

Question 9

What is Bluetooth used for?

Answer 9

Short-range wireless communication between personal devices.

It is commonly used for connecting peripherals.

Question 10

What types of devices commonly use Bluetooth?

Answer 10

• Headsets
• Speakers
• Keyboards
• Mice

These devices benefit from wireless connectivity.

Question 11

What frequency band does Bluetooth use?

Answer 11

The 2.4 GHz unlicensed ISM band.

This band is shared with other technologies like Wi-Fi.

Question 12

What is the typical range of Bluetooth?

Answer 12

About 10 meters.

This range is suitable for personal device connectivity.

Question 13

What does RFID stand for?

Answer 13

Radio Frequency Identification.

RFID technology is used for tracking and identification.

Question 14

What type of communication does RFID use?

Answer 14

One-way communication.

RFID tags transmit data to a reader without requiring a response.

Question 15

What are common uses of RFID?

Answer 15

• Access badges
• Inventory tags
• Pet identification
• Product tracking

RFID is widely used in various industries for efficient tracking.

Question 16

How are many RFID tags powered?

Answer 16

Passively, using energy from the scanner’s radio signal.

This allows for smaller and more cost-effective tags.

Question 17

What is NFC?

Answer 17

A short-range wireless technology based on RFID.

NFC is designed for very close proximity communication.

Question 18

How does NFC differ from RFID?

Answer 18

NFC supports two-way communication.

This allows devices to exchange information interactively.

Question 19

What are common uses of NFC?

Answer 19

• Mobile payments
• Device pairing
• Access control
• Identification

NFC technology is increasingly used in consumer applications.