Wi-Fi has changed significantly since the first IEEE 802.11 standard was published in 1997. Each new generation has brought higher data rates, better network efficiency, improved support for multiple devices, and, more recently, lower latency and better use of available radio spectrum.
The names used today, such as Wi-Fi 5, Wi-Fi 6 and Wi-Fi 7, are consumer-friendly names introduced by the Wi-Fi Alliance. The underlying technical standards are developed by the IEEE 802.11 working group. For example, Wi-Fi 6 is based on IEEE 802.11ax, while Wi-Fi 7 is based on IEEE 802.11be.
A brief overview of Wi-Fi generations
| Wi-Fi generation | IEEE standard | Main frequency bands | Maximum theoretical data rate* | Main improvement |
|---|---|---|---|---|
| Wi-Fi 1 | 802.11b | 2.4 GHz | 11 Mbps | First widely used Wi-Fi generation |
| Wi-Fi 2 | 802.11a | 5 GHz | 54 Mbps | Higher speed and less congestion |
| Wi-Fi 3 | 802.11g | 2.4 GHz | 54 Mbps | Higher speed with backward compatibility |
| Wi-Fi 4 | 802.11n | 2.4 GHz / 5 GHz | 600 Mbps | MIMO and wider channels |
| Wi-Fi 5 | 802.11ac | 5 GHz | 6.9 Gbps | Wider channels and higher throughput |
| Wi-Fi 6 | 802.11ax | 2.4 GHz / 5 GHz | 9.6 Gbps | Better efficiency with many devices |
| Wi-Fi 6E | 802.11ax | 2.4 GHz / 5 GHz / 6 GHz | 9.6 Gbps | Wi-Fi 6 extended to 6 GHz |
| Wi-Fi 7 | 802.11be | 2.4 GHz / 5 GHz / 6 GHz | Up to about 23 Gbps | 320 MHz channels, 4096-QAM and MLO |
| Wi-Fi 8 | 802.11bn | Not finalized | Not finalized | Focus on reliability and consistent performance |
* Maximum theoretical rates depend on channel width, modulation, number of spatial streams and other technical parameters. They should not be confused with actual Internet or file-transfer speeds.
A short history of Wi-Fi
The IEEE 802.11 working group began developing wireless LAN standards in 1990. The first IEEE 802.11 standard was published in 1997.
The first widely used extensions appeared in 1999. IEEE 802.11a introduced operation in the 5 GHz band with a maximum physical data rate of 54 Mbps. IEEE 802.11b operated in the 2.4 GHz band and provided up to 11 Mbps.
In 2003, IEEE 802.11g brought speeds of up to 54 Mbps to the 2.4 GHz band while maintaining compatibility with 802.11b devices.
The following generations brought progressively higher performance:
- Wi-Fi 4 (802.11n) introduced MIMO and significantly increased throughput.
- Wi-Fi 5 (802.11ac) concentrated on higher performance in the 5 GHz band.
- Wi-Fi 6 (802.11ax) improved efficiency and capacity, especially when many devices share the network.
- Wi-Fi 6E extended Wi-Fi 6 technology into the 6 GHz band.
- Wi-Fi 7 (802.11be) introduced technologies designed to provide higher throughput, lower latency and better reliability.
- Wi-Fi 8 (802.11bn) is the next generation and is still under development.
What is the difference between Wi-Fi and IEEE 802.11?
IEEE 802.11 is a family of technical standards that defines wireless LAN communication.
Wi-Fi is the name used for products and technologies based on these standards. The Wi-Fi Alliance introduced generation numbers because they are easier for consumers to understand.
For example:
- IEEE 802.11n = Wi-Fi 4
- IEEE 802.11ac = Wi-Fi 5
- IEEE 802.11ax = Wi-Fi 6
- IEEE 802.11be = Wi-Fi 7
Therefore, Wi-Fi 6 and 802.11ax are not two different technologies. They refer to the same generation using different naming systems.
Wi-Fi 1, Wi-Fi 2 and Wi-Fi 3
The first three Wi-Fi generation numbers can be confusing because they were assigned retrospectively.
The original IEEE 802.11 standard appeared in 1997. The important 802.11a and 802.11b amendments followed in 1999.
802.11a operated in the 5 GHz band and supported a maximum physical data rate of 54 Mbps. 802.11b operated in the 2.4 GHz band and supported up to 11 Mbps.
IEEE 802.11g followed in 2003. It provided up to 54 Mbps in the 2.4 GHz band and was backward compatible with 802.11b.
These standards are now commonly referred to as Wi-Fi 2 and Wi-Fi 1, while 802.11g is known as Wi-Fi 3.
The numbering should therefore not be interpreted as a direct sequence of IEEE standard numbers. Wi-Fi 1, Wi-Fi 2 and Wi-Fi 3 are consumer-generation names created later.
Wi-Fi 4 and Wi-Fi 5
Wi-Fi 4, based on IEEE 802.11n, was an important step forward. It introduced MIMO and could operate in both the 2.4 GHz and 5 GHz bands. Under maximum conditions, 802.11n could reach 600 Mbps.
Wi-Fi 5, based on IEEE 802.11ac, concentrated on improving wireless performance in the 5 GHz band. It introduced wider channels and higher-order modulation, allowing theoretical data rates of several gigabits per second.
The higher theoretical speed of Wi-Fi 5 does not mean that every device can reach it. Actual performance depends on the router, client device, channel width, number of antennas, signal strength and interference.
Wi-Fi 6 and Wi-Fi 6E
Wi-Fi 6 is based on IEEE 802.11ax. Unlike earlier generations, which focused heavily on increasing maximum speed, Wi-Fi 6 also places a strong emphasis on network efficiency and capacity.
Technologies such as OFDMA and improved MU-MIMO allow a Wi-Fi 6 network to handle multiple connected devices more efficiently.
This is particularly useful in modern homes, offices and public places where many smartphones, computers, televisions, smart home devices and other equipment may be connected simultaneously.
Wi-Fi 6E is not a separate IEEE standard. It uses the same IEEE 802.11ax technology as Wi-Fi 6 but extends it into the 6 GHz band.
The additional 6 GHz spectrum provides access to more channels and can reduce congestion. However, availability of the 6 GHz band and the permitted channels depends on local regulations.
Wi-Fi 7
Wi-Fi 7 is based on IEEE 802.11be. It is designed to provide substantially higher throughput while also improving latency and connection reliability.
Some of the most important Wi-Fi 7 technologies are:
- 320 MHz channels for higher throughput where suitable 6 GHz spectrum is available.
- 4096-QAM for higher data rates under good signal conditions.
- Multi-Link Operation (MLO), which allows compatible devices to use multiple wireless links.
- Improved use of spectrum and more flexible resource allocation.
One of the important differences between Wi-Fi 6 and Wi-Fi 7 is that Wi-Fi 7 is not simply about increasing the maximum theoretical speed. Multi-Link Operation, for example, can help improve latency, throughput and reliability by using multiple links.
Wi-Fi 8
Wi-Fi 8 is associated with the IEEE 802.11bn standard and is currently under development.
Since the standard has not yet been approved, its final technical specifications should not be presented as established facts. Development and subsequent certification are planned by 2027.
The overall direction of Wi-Fi 8’s development is to improve reliability, stability, and performance in challenging wireless environments, rather than simply increasing the maximum theoretical data transfer rate.
A short history of Wi-Fi
The IEEE 802.11 working group began developing wireless LAN standards in 1990. The first IEEE 802.11 standard was published in 1997.
The first widely used extensions appeared in 1999. IEEE 802.11a introduced operation in the 5 GHz band with a maximum physical data rate of 54 Mbps. IEEE 802.11b operated in the 2.4 GHz band and provided up to 11 Mbps.
In 2003, IEEE 802.11g brought speeds of up to 54 Mbps to the 2.4 GHz band while maintaining compatibility with 802.11b devices.
The following generations brought progressively higher performance:
- Wi-Fi 4 (802.11n) introduced MIMO and significantly increased throughput.
- Wi-Fi 5 (802.11ac) concentrated on higher performance in the 5 GHz band.
- Wi-Fi 6 (802.11ax) improved efficiency and capacity, especially when many devices share the network.
- Wi-Fi 6E extended Wi-Fi 6 technology into the 6 GHz band.
- Wi-Fi 7 (802.11be) introduced technologies designed to provide higher throughput, lower latency and better reliability.
- Wi-Fi 8 (802.11bn) is the next generation and is still under development.
Which Wi-Fi generation do you need?
You don’t necessarily have to choose the latest Wi-Fi generation just because it has a higher number. Newer standards are geared more toward use in corporate environments with a large number of users.
Wi-Fi 5 is still sufficient for basic internet access, streaming, and a typical home network. This standard is perfectly suitable for home use.
Wi-Fi 6 is a good choice for a modern home with a large number of connected devices. Its main advantage is increased network efficiency, meaning it supports many simultaneous connections.
Wi-Fi 6E can be useful if you have compatible devices, and the additional 6 GHz band offers advantages in congested environments, such as densely built-up areas.
Wi-Fi 7 is designed primarily for enterprise environments but can also be used at home.
Most consumers shouldn’t consider Wi-Fi 8 just yet, as this standard is still under development.
