802.11 types (Wi-Fi)

What is the most common frequency band used by 802.11 Wi-Fi networks?

• A) 2.4 GHz

• B) 5 GHz

• C) 1.5 GHz

• D) 3.0 GHz

Answer explanation

The 2.4 GHz frequency band is commonly used for 802.11 Wi-Fi networks.

Which 802.11 standard operates exclusively in the 5 GHz frequency band?

• A) 802.11a

• B) 802.11b

• C) 802.11g

• D) 802.11n

Answer explanation

802.11a operates in the 5 GHz band.

What is the maximum theoretical data rate of 802.11b Wi-Fi?

• A) 11 Mbps

• B) 54 Mbps

• C) 150 Mbps

• D) 600 Mbps

Answer explanation

802.11b has a maximum data rate of 11 Mbps.

Which 802.11 standard introduced Multiple Input Multiple Output (MIMO) technology for improved performance?

• A) 802.11a

• B) 802.11g

• C) 802.11n

• D) 802.11ac

Answer explanation

802.11n introduced MIMO for better throughput and coverage.

What is the primary advantage of 802.11ac over its predecessors?

• A) Higher data rates

• B) Better security

• C) Lower power consumption

• D) Longer range

Answer explanation

802.11ac offers higher data rates compared to previous standards.

Which 802.11 standard introduced the use of the 5 GHz frequency band and backward compatibility with 802.11b?

• A) 802.11a

• B) 802.11g

• C) 802.11n

• D) 802.11ac

Answer explanation

802.11g operates in the 2.4 GHz band and introduced backward compatibility with 802.11b.

What is the primary purpose of the 802.11i standard?

• A) Improved data rates

• B) Enhanced security (WPA2)

• C) Extended range

• D) Better interference mitigation

Answer explanation

802.11i introduced enhanced security features, including WPA2.

Which 802.11 standard introduced beamforming to improve signal coverage and reliability?

• A) 802.11n

• B) 802.11ac

• C) 802.11ax

• D) 802.11g

Answer explanation

Beamforming was introduced in 802.11ac for better signal performance.