This generally refers to the number of connected devices that can download or upload at once—16/4 means you have 16 downstream channels for 16 devices and 4 upstream channels. But keep in mind that your overall upstream and downstream speeds are more important, since data speeds are evenly distributed across connected devices unless you prioritize certain connections in your router settings. Today’s devices and routers have jumped onto the Wi-Fi 6 bandwagon, which utilizes speeds of up to 10 Gbps compared to last gen’s 3.5 Gbps, and some routers incorporate the incremental upgrade of Wi-Fi 6E, which further boosts speed and security while helping minimize latency over Wi-Fi 6.