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Wi is Fi
Wi is Fi explains Wi-Fi generations, client capabilities, speed, and overhead to help readers evaluate upgrade choices.
About Wi is Fi
Wi is Fi is a long-form educational guide to Wi-Fi. It covers Wi-Fi 4 through Wi-Fi 8 (802.11n, ac, ax, be, and bn), explains how client devices limit real-world speed, and describes the difference between link speed (PHY) and throughput. It also addresses router marketing claims, overhead, range extenders, access points, mesh networks, and steps for improving Wi-Fi speed. The stated aim is to help readers make their own Wi-Fi upgrade decisions. The version shown is 11.6v, updated October 8, 2026.
The guide states that it describes how Wi-Fi works in the United States. Most of its content also applies elsewhere, but supported channels and allowed transmit power differ by country, and the guide refers readers to Wikipedia for those details. Some examples are tied to specific hardware, such as a 1.95 Gbps throughput test using an Intel AX210 client and a TP-Link AX80 router.
Key features
- Explains Wi-Fi 4, 5, 6, 6E, 7, and 8 with their 802.11 standard names
- Describes how client device capabilities limit achievable Wi-Fi speeds
- Distinguishes PHY link speed from real-world throughput
- Explains why advertised combined multi-band router speeds are misleading
- Covers DFS channels in the 5 GHz band and Wi-Fi 6E operation in 6 GHz
- Compares range extenders, wireless access points, and mesh Wi-Fi networks
Best for: Readers who are comparing Wi-Fi routers or client devices and want technical background on Wi-Fi generations and realistic speeds.
Good for
- Explains the reasons behind speed limits, not only the specifications
- Includes a terminology section for readers unfamiliar with technical terms
- Shows a dated version number, indicating when the guide was last updated
Watch out for
- Written mainly for Wi-Fi as used in the United States; channels and transmit power differ in other countries
- Relies on technical terms such as PHY, MIMO, and DFS, which may require the terminology section
- Some recommendations are tied to a specific date, so they may change over time
Wi is Fi at a glance
- Website
- wiisfi.com
- Category
- Education & Learning › Learn to Code
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Android, Web, Windows
- Open source
- Not stated
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Wi is Fi FAQ
Does the guide apply outside the United States?
Most of the content also applies to other countries, but supported channels and allowed transmit power vary. The guide refers readers to Wikipedia for country-specific details.
Do advertised router speeds reflect what devices will achieve?
The guide states that advertised figures add the maximum speeds of all Wi-Fi bands together. Client devices are usually limited to a single band and often to 2x2 MIMO, so the realistic speed a device can reach is the more relevant measure.
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