FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -The standard added support for multiple-input multiple-output antennas (MIMO). 802.11n operates on both the 2.4 GHz and the 5 GHz bands. Support for 5 GHz bands is optional.

Detailed explanation-2: -802.11a supported the 5 GHz band and a theoretical maximum speed of 54 Mbps. In the early 2000s, many business/enterprise wireless devices used 802.11a Wi-Fi radios. The 5GHz bandwidths allowed for higher speeds than 802.11b and 2.4 GHz.

Detailed explanation-3: -Wi-Fi 6/802.11ax. AX operates in both the 2.4 GHz and 5 GHz frequencies and is backward compatible with Wi-Fi 4 and 5. To achieve the significant speed and capacity increase, Wi-Fi 6 layers MU-MIMO (multi-user, multiple-input, multiple-output) with OFDMA (orthogonal frequency-division multiple access technology).

Detailed explanation-4: -802.11n, also known as WiFi 4, was the first one that was “dual-band” enabled (both 2.4 and 5 GHz frequencies). 802.11ac, also known as WiFi 5, is the current standard. 802.11ax, also known as WiFi 6, is the next-gen WiFi standard. Each new standard comes with improvements in speed and efficiency made over time.

Detailed explanation-5: -Frequency Ranges of the 802.11 network-types: 802.11a: 5GHz band. 802.11b and 802.11g: 2.4GHz only: Operate only in the 2.4GHz frequency band. 802.11G is from 2004 and 802.11B was the first WiFi standard: 1990s to 2004.