802.11 standards
1. **802.11a:**
- Introduced in 1999.
- Operates in the 5 GHz frequency band.
- O ers data rates up to 54 Mbps.
- Less susceptible to interference but has shorter range compared to 802.11b.
2. **802.11b:**
- Also introduced in 1999.
- Operates in the 2.4 GHz frequency band.
- O ers data rates up to 11 Mbps.
- Widespread adoption due to its compatibility with existing infrastructure.
3. **802.11g:**
- Rati ed in 2003.
- Operates in the 2.4 GHz frequency band.
- O ers data rates up to 54 Mbps.
- Backward compatible with 802.11b.
4. **802.11n:**
- Rati ed in 2009.
- Supports both 2.4 GHz and 5 GHz frequency bands.
- Utilizes Multiple Input Multiple Output (MIMO) technology.
- O ers increased data rates, potentially reaching 600 Mbps or more.
5. **802.11ac:**
- Rati ed in 2013.
- Operates in the 5 GHz frequency band.
- Utilizes wider channels and additional spatial streams.
- O ers signi cantly higher data rates, potentially reaching gigabit speeds.
6. **802.11ax (Wi-Fi 6):**
- Rati ed in 2019.
- Introduces Orthogonal Frequency Division Multiple Access (OFDMA) for
improved e ciency.
- Operates in both 2.4 GHz and 5 GHz frequency bands.
- Designed to handle high-density environments and improve overall network
performance.
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7. **802.11ay:**
- Aims to operate in the 60 GHz frequency band.
- Intended for high-data-rate, short-range communications.
- Designed to support applications like high-de nition video streaming and
augmented reality.
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8. **802.11be (Wi-Fi 7):**
- An upcoming standard (as of my last update in January 2022).
- Expected to further improve data rates, e ciency, and performance in dense
environments.
- Likely to introduce new technologies to meet the evolving demands of
wireless communication.