2.3 - Wireless Network Standards

Question 1

Front

Answer 1

Back

Question 2

What is the IEEE 802 committee responsible for?

Answer 2

The IEEE 802 committee is responsible for standards related to LAN (Local Area Network) and MAN (Metropolitan Area Network), including wireless networking standards.

Question 3

What is the IEEE 802.11 standard?

Answer 3

The IEEE 802.11 standard refers to the suite of protocols for wireless networks, commonly known as Wi-Fi, managed by the IEEE 802 committee.

Question 4

What was the first wireless standard released in October 1999?

Answer 4

The first wireless standard released in October 1999 was 802.11a.

Question 5

What frequency range does 802.11a operate in?

Answer 5

802.11a operates exclusively in the 5 GHz frequency range.

Question 6

What is the maximum speed of 802.11a?

Answer 6

The maximum speed of 802.11a is 54 megabits per second.

Question 7

Why might 802.11a have a shorter range than 802.11b?

Answer 7

802.11a operates at a higher frequency (5 GHz), which is more easily absorbed by objects compared to the lower frequency (2.4 GHz) used by 802.11b, which tends to bounce off objects and provide a longer range.

Question 8

What frequency range does 802.11b operate in?

Answer 8

802.11b operates in the 2.4 GHz frequency range.

Question 9

What is the maximum speed of 802.11b?

Answer 9

The maximum speed of 802.11b is 11 megabits per second.

Question 10

What are some common devices that use the 2.4 GHz frequency range?

Answer 10

Common devices that use the 2.4 GHz frequency range include baby monitors, cordless phones, and Bluetooth devices.

Question 11

Which standard was an upgrade to 802.11b and released in June 2003?

Answer 11

802.11g was an upgrade to 802.11b, released in June 2003.

Question 12

What is the maximum speed of 802.11g and what frequency does it use?

Answer 12

802.11g has a maximum speed of 54 megabits per second and operates in the 2.4 GHz frequency range.

Question 13

How does 802.11g compare to 802.11b in terms of speed and compatibility?

Answer 13

802.11g is faster than 802.11b (54 Mbps vs. 11 Mbps) and is backward compatible with 802.11b, allowing devices using 802.11b to connect to an 802.11g network.

Question 14

What is the 802.11n standard also known as, and when was it introduced?

Answer 14

The 802.11n standard is also known as Wi-Fi 4 and was introduced in 2009.

Question 15

What frequencies can 802.11n operate on, and what is its maximum theoretical throughput?

Answer 15

802.11n can operate on both 5 GHz and 2.4 GHz frequencies and can achieve a maximum theoretical throughput of 600 megabits per second.

Question 16

What technology did 802.11n introduce to enhance communication?

Answer 16

802.11n introduced MIMO (Multiple Input Multiple Output) technology to enhance communication by allowing multiple data streams simultaneously.

Question 17

What is the Wi-Fi 5 standard, and when was it introduced?

Answer 17

The Wi-Fi 5 standard, also known as 802.11ac, was introduced in January 2014.

Question 18

What frequency range does 802.11ac operate in, and what is its maximum theoretical throughput?

Answer 18

802.11ac operates exclusively in the 5 GHz range and supports a maximum theoretical throughput of nearly 7 gigabits per second.

Question 19

What is multi-user MIMO in 802.11ac, and how many streams does it support?

Answer 19

Multi-user MIMO in 802.11ac allows multiple users to communicate simultaneously and supports up to eight streams.

Question 20

What is the latest wireless standard introduced in February 2021, and what is it also known as?

Answer 20

The latest wireless standard introduced in February 2021 is 802.11ax, also known as Wi-Fi 6.

Question 21

What frequencies does 802.11ax operate on, and what is its maximum theoretical throughput?

Answer 21

802.11ax operates on both 5 GHz and 2.4 GHz frequencies and supports a maximum theoretical throughput of 9.6 gigabits per second.

Question 22

What technology does 802.11ax use to improve performance in crowded areas?

Answer 22

802.11ax uses Orthogonal Frequency Division Multiple Access (OFDMA) to improve performance in areas with high numbers of users.

Question 23

What are the common antenna ranges for home and office environments, and what is required for long-range connections?

Answer 23

In home and office environments, antennas typically provide a range of 40 to 50 meters. For long-range connections between buildings, fixed directional antennas and increased signal strength are needed.

Question 24

What is RFID and where is it commonly used?

Answer 24

RFID (Radio Frequency Identification) is used for access badges, inventory tracking, and pet identification, among other applications.

Question 25

What is NFC and how is it different from RFID?

Answer 25

NFC (Near Field Communication) is a type of RFID technology used for short-range, two-way communication, commonly used in mobile payments and device pairing.