The Wi-Fi generation and the number of bands are what separate the models most clearly. A dual-band AC router such as the Archer C6 or C80 is enough for ordinary home use, while Wi-Fi 6 models from AX1500 to AX5400 share bandwidth better when there are dozens of devices. Make sure the router has gigabit ports if your connection is fast — lighter models still have Fast Ethernet — and for business use there are VPN routers in TP-Link's Omada series.
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The Wi-Fi generation and the number of bands are what separate the models most clearly. A dual-band AC router such as the Archer C6 or C80 is enough for ordinary home use, while Wi-Fi 6 models from AX1500 to AX5400 share bandwidth better when there are dozens of devices. Make sure the router has gigabit ports if your connection is fast — lighter models still have Fast Ethernet — and for business use there are VPN routers in TP-Link's Omada series.