There's a lot of confusion in the world of wireless technology, often confusing users when choosing a new router or network card. Device boxes are emblazoned with Wi-Fi 6 logos, while technical specifications feature cryptic designations like 802.11ax. To understand what equipment is truly needed for a stable network, it's important to understand the nomenclature of the Institute of Electrical and Electronics Engineers (IEEE).
This organization develops technical standards that are subsequently commercialized by the Wi-Fi Alliance. Understanding the relationship between the specification number and the marketing name will help you avoid overpaying for unnecessary features and properly configure your home network. In this article, we'll take a detailed look at the evolution of protocols, their real-world speeds, and compatibility.
Basics of Wireless Network Classification
The foundation of any modern wireless communication is a family of standards IEEE 802.11These documents define the rules for how devices interact within a local network, signal modulation methods, and the frequency ranges used. For a long time, consumers were faced with inconvenient letter designations (a, b, g, n, ac), making it difficult to understand which version of the technology was newer and faster.
To make it easier to understand, a new naming system was introduced, where generations of technology were given sequential numbers. Now, when you see the markings Wi-Fi 6, you immediately understand that this is the sixth generation, replacing the fifth. However, deep within the router settings and drivers, IEEE code names still appear, and they cannot be ignored.
Each new standard brings improvements not only to the maximum theoretical speed, but also to the efficiency of operation in noisy airwaves. For example, the transition to OFDMA The new specifications significantly reduced latency when connecting multiple devices simultaneously. This is critical for modern smart homes, where dozens of devices compete for the connection.
⚠️ Please note: Supporting a standard does not guarantee maximum speed. If your router supports 802.11ax, but your smartphone only supports 802.11ac, the connection will be established using the older protocol.
The differences lie in the data encoding methods and the channel width used. Older protocols may operate at 2.4 GHz, which is heavily congested with microwave ovens and neighboring networks, while newer standards actively utilize the 5 GHz and even 6 GHz bands. Understanding these nuances helps diagnose internet speed issues.
Evolution of standards: from 802.11b to 802.11n
The history of mass Wi-Fi began with a specification 802.11b, which made wireless internet access accessible to a wide range of users for the first time. This standard operated exclusively in the 2.4 GHz band and offered maximum speeds of up to 11 Mbps. While this is negligible by today's standards, it was a revolution at the time, freeing computers from wires.
He was soon replaced by 802.11a, which operated at a 5 GHz frequency and offered speeds of up to 54 Mbps. However, due to the high cost of equipment and shorter range at higher frequencies, it did not immediately become widespread. A real breakthrough came with the advent of 802.11g, which combined the high speed of its predecessor, "a," with the long-range and low cost of the 2.4 GHz band.
For a long time the gold standard remained 802.11n, also known as Wi-Fi 4. It introduced MIMO (Multiple Input Multiple Output) technology, which allows multiple antennas to transmit data simultaneously. This allowed the theoretical speed limit to be raised to 600 Mbps, although in practice, users rarely saw more than 150-300 Mbps.
It's important to note that it was during the 802.11n era that the active division of bands began. Routers became dual-band, broadcasting two networks: one for older devices and one for newer ones. This solution allowed for maintaining compatibility with devices from decades ago without sacrificing the performance of modern laptops.
Modern standards: 802.11ac and 802.11ax
The fifth generation, known as 802.11ac Wi-Fi 5, or Wi-Fi 5, represented a real leap in performance. Developers focused primarily on the 5 GHz band, where more available channels are available. The introduction of MU-MIMO technology allowed the router to communicate with multiple devices simultaneously, rather than switching between them at breakneck speeds, which previously created data packet queues.
The current industry flagship is the standard 802.11ax, or Wi-Fi 6. It's optimized not so much for peak single-client speeds as for efficiency in densely populated areas. Using the OFDMA access method, the router can split the channel into small subcarriers and transmit data to multiple devices in a single time slot. This dramatically reduces ping in games and latency during video calls.
The 802.11ax extension, known as Wi-Fi 6E, deserves special attention. The "E" stands for "Extended," indicating access to the new, clear 6 GHz band. This spectrum is currently free of interference from older devices, ensuring stable data transmission with minimal interference. However, operation in this band requires appropriate support from client devices.
⚠️ Please note: To use the 6 GHz band (Wi-Fi 6E), you need not only a router but also a network card or smartphone that supports this frequency range. Older devices simply won't see this network.
When choosing equipment, keep in mind that upgrading to 802.11ax only provides a noticeable boost if you have multiple active clients. For a single user with a single laptop, the difference between fast 802.11ac and basic 802.11ax may not be as noticeable as it seems on paper if your ISP doesn't offer gigabit speeds.
IEEE and Wi-Fi Standards Correspondence Chart
To organize your knowledge and quickly navigate equipment specifications, it's most convenient to use a summary table. It shows a direct connection between the protocol's technical name, its commercial name, the year it was adopted, and the maximum theoretical performance.
Note the frequency column: older standards are limited to the "dirty" 2.4 GHz range, while newer standards can aggregate channels and operate at higher frequencies, where the signal attenuates faster but the data transfer rate is much higher.
| IEEE standard | Marketing name | Year of release | Frequencies | Max. speed |
|---|---|---|---|---|
| 802.11b | Wi-Fi 1 | 1999 | 2.4 GHz | 11 Mbps |
| 802.11g | Wi-Fi 2 | 2003 | 2.4 GHz | 54 Mbps |
| 802.11n | Wi-Fi 4 | 2009 | 2.4 / 5 GHz | 600 Mbps |
| 802.11ac | Wi-Fi 5 | 2014 | 5 GHz | 6.9 Gbps |
| 802.11ax | Wi-Fi 6 / 6E | 2019 | 2.4 / 5 / 6 GHz | 9.6 Gbps |
The table shows that development is progressing by leaps and bounds. While 802.11g was sufficient for watching HD video, 4K streaming, VR gaming, and downloading large files now require 802.11ac or newer. However, high theoretical speeds don't always translate into user experience unless security and traffic prioritization are configured.
Technical differences and compatibility
One of the main advantages of the Wi-Fi ecosystem is backward compatibility. A router that supports 802.11ax, will accept a connection from a laptop with an 802.11n card without any problems. However, in this case, the connection will be established according to the rules of the older standard, and all the advantages of the new router will be unavailable to that particular client.
There is an important difference in modulation methods. The new standards use 1024-QAM, which allows more data bits to be encoded in a single signal compared to 256-QAM in Wi-Fi 5. This provides a speed increase of approximately 25% under equal conditions, but requires a very clear signal and close proximity to the access point.
Channel width is also critical. Older devices often operate with a channel width of 20 MHz, while newer standards allow for 80 and even 160 MHz. Wider channels are like adding more lanes to a highway: more cars (and data) can pass through at once, but the range of such a "wide" signal is shorter and it's more susceptible to attenuation through walls.
Why is the speed lower than stated?
Actual speed is always lower than theoretical due to protocol overhead, interference in the air, distance to the router, and the device's processor capabilities. Typically, actual speed is 50-70% of the standard's maximum.
When setting up a network, it's important to select the correct operating mode. If your home only has modern devices, it makes sense to disable legacy mode support (b/g), which can slightly improve overall network efficiency. However, in a mixed environment, it's better to leave the automatic mode selected.
How to check and select the right standard
For the average user, checking the current connection standard is possible through the operating system. In Windows, this is done through the Network and Sharing Center: click the Wi-Fi icon, select "Properties," and find the "Protocol" line. It will show, for example, Wi-Fi 5 (802.11ac)On macOS, this information is available via the "Wi-Fi Status" menu while holding down the Option key.
When choosing a new router, don't rush for the most expensive standard if your devices don't support it. Check the specifications of your smartphones and laptops. If they're more than five years old, they're unlikely to support Wi-Fi 6. In this case, buying a top-of-the-line router will be a waste of money, as your client devices will remain the bottleneck.
Pay attention to the number of MIMO streams. A router may support 802.11ac but only have one antenna (1x1), which will limit speed. A 2x2 or 4x4 configuration is currently considered good practice. Support for 160 MHz channel width is also important, as this is only really noticeable in the ac and ax standards.
☑️ Check before buying a router
If you plan to use the network for gaming or big data processing, a WAN port with a speed of 1 Gbps or higher is also essential. There's no point in buying an 802.11ax router with 2 Gbps over-the-air speed if the upstream port is limited to 100 Mbps, which is still common in budget models.
The Future of Wireless Networking: 802.11be
A new standard is already looming on the horizon 802.11be, which will be commercially known as Wi-Fi 7. This isn't just an evolutionary improvement, but a quantum leap, offering extremely high throughput (EHT). The primary focus is on minimizing latency and operating with 320 MHz channels.
One of the key features will be Multi-Link Operation (MLO). This technology will allow devices to simultaneously connect to the router via different bands (for example, 5 GHz and 6 GHz simultaneously), combining their speeds and providing redundancy. If one band is noisy, data will flow through the other without interrupting the connection.
⚠️ Please note: Standards and frequency ranges are regulated by the laws of each country. In some regions, the 6 GHz band may be partially or completely closed to civilian use. Always check local regulations.
The introduction of 802.11be will require a replacement of client devices, as backward compatibility will remain, but only next-generation devices will be able to realize the new technology's full potential. For now, the market is dominated by the 802.11ac and 802.11ax combination, which fully covers the needs of 95% of users.
What is the main difference between Wi-Fi 5 and Wi-Fi 6?
The main difference lies in the efficiency of working with multiple devices. Wi-Fi 6 (802.11ax) uses OFDMA technology, which allows data to be transmitted to multiple clients simultaneously on a single channel, reducing latency and increasing overall network throughput in congested airwaves.
Do I need to change my router if I have a 100 Mbps tariff?
If your current router supports the 802.11n (Wi-Fi 4) standard or higher, it's technically capable of delivering 100 Mbps over Wi-Fi. Upgrading to Wi-Fi 6 for this speed isn't worth it, but it may be necessary if your old router frequently freezes or has poor coverage.
Why can't my laptop see the 5GHz network?
Your laptop's network card is likely outdated and only supports 802.11b/g/n at 2.4 GHz. To connect to 5 GHz, you need support for 802.11a/n/ac/ax. Check the adapter's specifications or use a USB Wi-Fi adapter that supports 5 GHz.