The Wi-Fi network adapter in a Microsoft Windows system may support dual band wireless connections, i.e, both the 2.4 GHz and 5 GHz bands for a wireless local area network (WLAN), or it may only only support the older 2.4 GHz standard. A radio frequency (RF) band is is a group of frequencies containing many channels. To determine if a wireless adapter can support both the 2.4 and 5 GhZ Wifi standards, you can obtain a command prompt and type the command
netsh wlan show drivers. If you see 802.11a listed on the "Radio types supported line, then the adapter supports the 5 GHz as well as the 2.4 GHz bands.
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