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CWNP Certified Wireless Network Administrator CWNA-109 · Domain 2: WLAN regulations and standards

5 GHz U-NII bands, 20/40/80/160 MHz channel bonding and channel numbering

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Last reviewed September 25, 2026 · Leer en español

The 5 GHz band provides far more spectrum than 2.4 GHz and is the workhorse of enterprise Wi-Fi. In the United States it is organized into U-NII bands (Unlicensed National Information Infrastructure). Exact availability varies by country, so treat the following as the common US picture and always check your regulatory domain.

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