Wi-Fi Standards Explained: From Wi-Fi 5 to Wi-Fi 7

Wi-Fi, the wireless network we use daily with our laptops and smartphones, operates on the IEEE 802.11 standard. Since its inception in 1997, the standard has seen numerous iterations. As of Summer 2025, three standards are predominantly in widespread use: 802.11ac (Wi-Fi 5), 802.11ax (Wi-Fi 6), and 802.11be (Wi-Fi 7).

UniFi Access Points, depending on the model, support these three standards. However, there's no point in purchasing "the latest and greatest" Access Point just because it can utilize the 6 GHz band, if your client devices (laptops, smartphones) do not support 6 GHz. In other words, both the Access Point and your clients must have the hardware capabilities to leverage the standard you wish to implement.

In this article, we'll delve into the most commonly used Wi-Fi standards today.

Wi-Fi 5 (802.11ac)

• Standard: IEEE 802.11ac
• Introduced: 2013 (which feels like an eternity ago in tech terms).
• Frequency Bands: Exclusively supports 5 GHz frequencies.
• Key Enhancements:
  • Introduced wider channels (80 or 160 MHz in the 5 GHz band, compared to 40 MHz in Wi-Fi 4).
  • Supported up to 8 MIMO spatial streams (up from 4 in Wi-Fi 4).
  • Added MU-MIMO (Multi-User, Multiple-Input, Multiple-Output) for downlink, allowing an AP to transmit to multiple compatible devices simultaneously.
• Theoretical Maximum Speed: Up to 6.9 Gbps.

Wi-Fi 6 (802.11ax)

• Standard: IEEE 802.11ax
• Introduced: 2021.
• Frequency Bands: Supports both 2.4 GHz and 5 GHz frequencies.
• Variant: Wi-Fi 6E is a variant that specifically extends Wi-Fi 6's capabilities to the 6 GHz frequency band.
• Target Environment: Primarily designed for high-density environments with many connected clients (e.g., schools, offices).
• Key Enhancements:
  • Introduced OFDMA (Orthogonal Frequency-Division Multiple Access), which splits a Wi-Fi channel into smaller sub-channels (Resource Units) and assigns them to different clients, enabling multiple devices to send and receive data simultaneously.
  • Improved MU-MIMO (for both uplink and downlink).
  • Target Wake Time (TWT) for better power efficiency.
• Theoretical Maximum Speed: Up to 9.6 Gbps.

Wi-Fi 7 (802.11be) - "Extremely High Throughput" (EHT)

• Standard: IEEE 802.11be
• Status: Introduced in 2024, but the standard is not yet formally finalized (ratified). The final version of the standard is expected by late 2025. Therefore, all devices currently marketed as Wi-Fi 7 are based on the 'draft' version of the standard.
• Frequency Bands: Supports 2.4 GHz, 5 GHz, and 6 GHz frequencies.
• Key Enhancements:
  • Expanded OFDMA capabilities: Clients can be assigned multiple Resource Units for greater efficiency.
  • Introduction of MLO (Multi-Link Operation), allowing clients to utilize multiple frequency bands simultaneously (e.g., 5 GHz and 6 GHz at once) for significantly higher speeds and lower latency.
• Theoretical Maximum Speed: Up to 23 Gbps .

Wi-Fi 7: Why 'Draft' Products Are Already Here

You read that correctly: IEEE 802.11be, or Wi-Fi 7, is not yet final, but "Wi-Fi 7" Access Points are already available. As of Summer 2025, the 802.11be standard is still in its final draft stages.

Why do manufacturers release products based on a draft standard? It's simple: business. Being first to market with the latest technology provides a significant competitive edge. A "Wi-Fi 7" sticker on the box is a strong marketing tool, attracting early adopters. Historically, differences between the final draft and the ratified version are minimal and can usually be addressed via firmware updates. Manufacturers design these devices with future updates in mind.

Choosing the Right UniFi Access Point for Your New Network

Given the current landscape, which UniFi Access Point should you choose for a new network?

• Wi-Fi 5 (802.11ac) has largely served its time and is less relevant for new deployments aiming for modern performance.
• Wi-Fi 7 (802.11be), while exciting, is still in its draft phase, and importantly, widespread client support (laptops, phones) is still developing.

Almost all modern devices support Wi-Fi 6 (802.11ax), which is also fully backward compatible with Wi-Fi 5. Unless you have a very specific use case that absolutely requires the bleeding edge of Wi-Fi 7 now, we recommend that Wi-Fi 6 devices are currently (Summer 2025) the way to go. They offer a mature, widely supported, and robust standard with excellent performance.

UniFi Access Points Supporting These Standards:

UniFi Devices with 802.11ax (Wi-Fi 6) Support:

• U6 Enterprise
• U6 Pro
• U6 Long-Range
• U6+
• U6 Enterprise In-Wall
• U6 In-Wall
• U6 extender
• U6 Mesh Pro
• U6 Mesh

UniFi Devices with 802.11be (Wi-Fi 7) Support:

• U7 Pro XGS
• U7 Pro XG
• U7 Pro Max
• U7 Pro
• U7 Long-Range
• U7 Lite
• U7 Pro Wall
• U7 In-Wall
• U7 Pro Outdoor
• U7 Outdoor
• E7 Campus
• E7
• E7 Audience

Understanding Backward Compatibility

It's important to remember that Wi-Fi Access Points are always backward compatible with previous standards. This means an Access Point that complies with the Wi-Fi 6 standard will still be able to communicate with a client that only supports Wi-Fi 4 at maximum. However, this older client will, of course, not be able to take advantage of the newer technologies or higher speeds offered by the Wi-Fi 6 standard.