IEEE 802.11a-1999 or 802.11a was an amendment to the IEEE 802.11 wireless local network specifications that defined requirements for an orthogonal frequency-division multiplexing (OFDM) communication system.

802.11b, 802.11g, and 802.11n-2.4 utilize the 2.400–2.500 GHz spectrum, one of the ISM bands. 802.11a, 802.11n, and 802.11ac use the more heavily regulated 4.915–5.825 GHz band. These are commonly referred to as the "2.4 GHz and 5 GHz bands" in most sales literature.

802.11a supports bandwidth up to 54 Mbps and signals in a regulated frequency spectrum around 5 GHz. This higher frequency compared to 802.11b shortens the range of 802.11a networks. An 802.11a access point transmitter may cover less than …

2024年6月28日 · 802.11a supports bandwidth up to 54 Mbps and signals in a regulated frequency spectrum around 5 GHz. This higher frequency, compared to 802.11b, shortens the range of 802.11a networks. The higher frequency also means 802.11a signals have more difficulty penetrating walls and other obstructions.

2024年9月18日 · 802.11a is an early industry standard for wireless LAN communication, introduced in 1999. While it's not widely used anymore, it helped pave the way for later standards like 802.11n/ac, which offer faster speeds and broader compatibility.

2024年12月30日 · 802.11a was established in 1999 and was one of the earliest amendments to the original 802.11 standard. It operates in the 5 GHz frequency band, enabling higher data rates while facing fewer interference issues compared to the lower 2.4 GHz band.

2020年12月12日 · 802.11a is an IEEE standard for transmitting data over a wireless network. It uses a 5 GHz frequency band and supports data transfer rates of 54 Mbps, or 6.75 megabytes per second. The 802.11a standard was released in 1999, around the same time as 802.11b.

2024年6月3日 · 802.11a: Legacy 5 GHz Wi-Fi. 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.

2021年3月17日 · IEEE 802.11a – This standard is developed in 1999. 802.11a is useful for commercial and industrial purposes. It works on a 5 GHz frequency. The maximum speed of 802.11a is 54 Mbps. This standard was made to avoid interference with other devices which use the 2.4 GHz band. IEEE 802.11b – This standard also created with 802.11a in 1999.

Discover everything about Wi-Fi standards, including IEEE 802.11ac, 802.11ax, and a detailed wireless standards chart. Learn how this impacts your wireless internet performance.