This article is mostly based on my own experience as well as the following links: Also, most cheap notebooks don’t support 5 GHz either. For example, only the iPhone 5 supports the 5 GHz band while all older iPhones do not. You should also know that only the newest (at the time of writing) and more expensive devices support the 5 GHz band. This helps on devices where you can’t prioritize your Wi-Fi networks (like on iOS or Android) to always pick the 5 GHz band. If your access point support both bands at the same time, use the same SSID for both (if you have the option to choose). The AirPort Express Base Station (2nd generation), for example, does support this, while my FritzBox 7270 only supports either 2.4 or 5 GHz (but not both at the same time). Not all Wi-Fi access points can use both bands at the same time. So, Wi-Fi speed is usually higher in the 5 GHz band than in the 2.4 GHz band. The advantage of the 5 GHz band is that it’s (currently) less crowded. All access points support the 2.4 GHz band, while most newer access points also support the new 5 GHz band. Wi-Fi channels are selected from a so called “frequency band”. Computers recognize Wi-Fi networks by their SSIDs, not by the channel they use. However, if you really want to manually select the Wi-Fi channels, use different channels for each access point (if possible). Most modern Wi-Fi access points can choose their Wi-Fi channels automatically and you should usually let them do this. As far as I understand it, on the first generation you need to plug your Ethernet cable into the (only-existing) Ethernet port instead. Note: I’ve only tested this with an AirPort Express Base Station of the second generation. You need to plug your Ethernet cable into the WAN port – not the Ethernet port. It’ll then pick the one that’s best suited (usually the one with the best signal strength).
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