Modern users rarely consider what's happening in the air when they connect to a wireless network. However, file download speeds, the stability of video calls, and ping in online games directly depend on the wireless standard currently in use. Wi-Fi version — this isn't just an abstract number, but a specific technical protocol that determines the maximum channel throughput and its resistance to interference. If your equipment only supports the older standard, even the fastest provider's plan won't be able to reach its full potential.
There's often confusion between router versions, network adapter driver versions, and supported 802.11 standards. Understanding these differences is critical for properly diagnosing speed issues. In this article, we'll discuss how to accurately determine your hardware's capabilities across different operating systems and what nuances affect actual network performance.
It's important to note that the connection always operates at the speed of the slowest device in the chain. If you're connecting a modern laptop with support Wi-Fi 6 to an old router running on the standard 802.11n, the connection will be established using the old protocol. This is why checking the specifications of both devices is the first step when upgrading a home network.
Main wireless communication standards and their differences
Before moving on to technical diagnostics, it's important to understand the evolution of IEEE 802.11 standards. Each new protocol introduced improvements in signal modulation, the number of antennas, and performance in noisy environments. Bandwidth The channel is the first thing that catches the eye when comparing generations.
The most common standard for a long time remained 802.11n, also known as Wi-Fi 4. It brought support for dual-band operation: 2.4 GHz and 5 GHz. However, its actual speed rarely exceeded 150-300 Mbps under ideal conditions. With the advent of 802.11ac (Wi-Fi 5) shifted focus to the 5 GHz band, allowing for gigabit speeds and wider channels.
Modern standard 802.11ax, or Wi-Fi 6, introduces OFDMA and MU-MIMO technologies, which allow for efficient simultaneous service of multiple devices without speed degradation. For the average user, this means no lag, even when connected to a smartphone, TV, or gaming laptop.
- 📡 Wi-Fi 4 (802.11n) — the basic standard, operating at up to 300 Mbps, often suffers from interference in the 2.4 GHz range.
- 🚀 Wi-Fi 5 (802.11ac) — oriented to 5 GHz, provides stable speeds of up to 867 Mbps and higher on a single antenna.
- ⚡ Wi-Fi 6 (802.11ax) - increases network efficiency, reduces latency, and improves performance in multi-apartment buildings.
- 🔮 Wi-Fi 6E — expansion of the sixth generation to the 6 GHz frequency range, which is not yet available in all countries.
⚠️ Attention: The markings on the router box may indicate the maximum theoretical speed (e.g., AC1200), which is the combined speed for all bands and antennas. The actual speed of a single device will always be lower than this stated speed.
Understanding these differences helps you correctly interpret speed test results. If your adapter only supports 802.11n, you physically won’t be able to get a speed higher than 300-400 Mbps, regardless of the quality of the provider’s cable.
Checking the Wi-Fi version in Windows
Windows users have several ways to obtain network connection information. The fastest and most reliable method doesn't require installing additional software and is accessible through standard system tools. However, to see detailed information about a standard, you need to know where to look.
Open the Start menu and type the command cmd to launch the command line. This tool provides access to low-level network stack data. In the window that opens, enter the command netsh wlan show interfaces and press Enter. The system will display a detailed report on the current wireless connection.
netsh wlan show interfacesIn the list of parameters, find the line Radio type (Radio Type) This is where the active connection standard is indicated, for example, 802.11ac or 802.11axHere you can also see the current data reception and transmission speed in real time, which changes dynamically depending on the signal quality.
An alternative way is to use the graphical interface. Go to Settings → Network & Internet → StatusClick the active connection's properties. This displays less technical but more user-friendly information, including the security protocol and channel frequency.
☑️ Wi-Fi Diagnostics in Windows
It's worth keeping in mind that the information in Windows reflects the current link status. If you move far away from the router, the adapter may automatically switch to a lower standard version or reduce the channel width to maintain the connection, which will be immediately reflected in the report.
Diagnosing a Network Adapter in macOS
Apple Macintosh owners also have access to detailed wireless connection information hidden in standard utilities. macOS is renowned for its optimized network interfaces, but it hides technical details from the average user.
To access hidden data, press and hold the key Option (Alt) on your keyboard and simultaneously click the Wi-Fi icon in the top menu bar. This will open an expanded menu where options such as PHY Mode (physical data transfer mode), signal level (RSSI) and noise level.
Parameter PHY Mode will show the active standard, for example 802.11acThe channel width (e.g., 80 MHz) is also displayed here, which directly impacts speed. If you see a channel width of 20 MHz, then even if the router supports wider channels, the connection is operating in economy mode.
A more in-depth analysis is available through the "Wireless Network Manager." To open it, press and hold Option and click on the Wi-Fi icon, then select "Open Wireless Network Manager" (or run Spotlight search Wireless Diagnostics). In the window menu, select Window → Performance for graphical analysis of signal quality in real time.
- 🍏 Option + Click — quick access to technical data without launching the terminal.
- 📶 RSSI — the level of the received signal, measured in dBm (the closer to 0, the better, for example -40 is better than -80).
- 🔇 Noise — noise level, a critical parameter for connection stability in apartment buildings.
- 📡 Tx Rate — the current data transfer speed from your Mac to the router.
⚠️ Attention: On Macs with Apple Silicon processors (M1, M2, M3), network power management can aggressively reduce adapter power. If you need maximum performance, check the power saving settings in the relevant system section.
Regularly monitoring these parameters helps you understand why speeds drop in certain areas of your apartment. Sudden spikes in noise levels often indicate a microwave oven or neighboring routers operating on the same frequency.
How to check the Wi-Fi standard in Linux
Linux users have access to powerful command-line tools that are often even more informative than Windows graphical interfaces. Linux kernel-based distributions provide direct access to network hardware drivers via a utility. iw.
Open the terminal and enter the command iw dev to view available interfaces. Typically, a wireless adapter is labeled as wlan0 or wlp2s0To get detailed information about the current connection, use the command iw dev [interface_name] link.
iw dev wlan0 linkIn the command output, you are interested in the field txrate and information about the standard. However, a more detailed summary, including supported protocols, is often provided by the command iwlistEnter . iwlist wlan0 scanning (root rights are required, so sudo) to see the list of networks and their parameters.
You can also use the utility nmcli (Network Manager CLI), which is available in most modern distributions. The command nmcli -f ACTIVE,SIGNAL,SECURITY,CHAN,FREQ dev wifi will display a table of all visible networks and their frequencies. A frequency of 5180 MHz or higher indicates the 5 GHz band, indirectly confirming support for modern standards.
What to do if the iw command is not found?
The iw utility is standard for newer Linux kernels. If it's missing, you may have a very old distribution. Try installing the iw package through a package manager (apt, yum, pacman) or use the deprecated but still functional iwconfig command, although it provides less detail.
In Linux, it is especially important to monitor drivers. Open source drivers (open-source) may not reveal the full potential of proprietary Broadcom or Realtek chips. Check the logs via dmesg | grep firmware will help ensure that the latest firmware version is loaded for your adapter.
Analyzing characteristics through the device manager
Regardless of the operating system, you can obtain fundamental hardware information through the Device Manager. This allows you to find out not only the current standard but also the maximum capabilities of your network adapter.
In Windows, click Win + X and select "Device Manager." Expand the "Network Adapters" branch. Find the name of your Wi-Fi module. Often, the name itself contains clues: the presence of letters AC, AX or ABGN indicates the supported standards.
For example, the model Intel Dual Band Wireless-AC 7260 clearly indicates support 802.11ac. If the title only N (For example, 802.11b/g/n), then this adapter will not be able to work in the Wi-Fi 5 or 6 standard, even if the router supports it.
| Adapter model | Supported standards | Max. speed (theoret.) | Ranges |
|---|---|---|---|
| Realtek RTL8188EE | 802.11b/g/n | 150 Mbps | 2.4 GHz |
| Intel Wi-Fi 6 AX200 | 802.11ax/ac/n | 2400 Mbps | 2.4 / 5 GHz |
| Broadcom BCM4352 | 802.11ac | 867 Mbps | 5 GHz |
| Qualcomm Atheros AR9285 | 802.11b/g/n | 300 Mbps | 2.4 GHz |
To obtain precise information on the model, go to the "Details" tab in the device properties and select "Hardware ID". The copied code (for example, VEN_8086&DEV_2723) can be entered into a search engine to find the chipset specifications on the manufacturer's website.
This method is especially useful when buying used laptops or upgrading older PCs when the documentation has been lost and the stickers have worn off. Knowing the exact chip model can help you decide whether to purchase a USB adapter if the built-in module is obsolete.
Impact of drivers and software
It often happens that a physically functional and modern adapter operates at low speeds due to outdated or incorrect software. Drivers — these are intermediaries between the operating system and the hardware, and their version can radically change the behavior of the device.
The Windows operating system often automatically installs "generic" drivers that provide basic functionality but do not enable advanced features such as MIMO or wide channels. For maximum performance, it is recommended to download drivers from the official website of the laptop or chipset manufacturer (Intel, Realtek, Qualcomm).
Driver properties in Device Manager often have an "Advanced" tab. You can find the operating mode settings there. Make sure that the setting Wireless Mode or 802.11n/ac Mode "Enabled" or "Auto" is selected, rather than being limited to the old standard.
⚠️ Attention: Driver interfaces and setting names may vary depending on the software version and hardware manufacturer. If you're unsure of a setting's meaning, it's best to leave it at the default value or consult the documentation.
It's also worth checking your motherboard's BIOS/UEFI version. In rare cases, BIOS updates contain fixes for the PCIe controllers connected to the Wi-Fi module, which can resolve connection stability issues.
Frequently Asked Questions (FAQ)
Why does my router support Wi-Fi 6, but my computer connects to Wi-Fi 4?
This happens if your network adapter doesn't physically support the 802.11ax standard. The router always downgrades to a common standard. Also, check if your router's compatibility mode is set to only support older devices, or try updating your adapter drivers.
How do I know which frequency (2.4 or 5 GHz) I'm operating on?
In Windows via command netsh wlan show interfaces Look at the "Channel" line. Channels 1-13 are 2.4 GHz, and channels 36 and above are 5 GHz. On macOS, this is immediately visible when you hold down the Option key.
Does Windows version affect Wi-Fi speed?
The OS version itself doesn't limit speed, but older versions (such as Windows 7) may not have optimizations for new encryption protocols and Wi-Fi 6 standards, requiring additional updates or preventing you from using the latest drivers.
Can antivirus software slow down Wi-Fi speed?
Yes, some antivirus programs scan all network traffic in real time. Try temporarily disabling network protection or adding exceptions for trusted processes to check the impact on speed.
What is better: updating the driver or buying a new adapter?
If your adapter is more than 5-7 years old, updating the drivers won't add support for new standards (for example, upgrading from N to AC). In this case, purchasing an external USB adapter that supports 5 GHz and AC/AX standards is an effective solution.