2.4GHz travels further and penetrates walls better, but tops out slower — good for smart home devices and rooms far from the router. 5GHz is faster with lower latency but drops off quickly through walls — better for laptops, consoles and 4K streaming when you're near the router. Most modern routers offer a “smart connect” feature that auto-assigns the best band per device, which is fine for most households.

2.4GHz传得更远、穿墙能力更强，但速度上限较低——适合智能家居设备和离路由器较远的房间。5GHz速度快、延迟低，但穿墙衰减明显——适合离路由器近的笔记本、游戏机、4K视频。大多数新路由器有“智能连接”功能会自动分配最优频段，对大部分家庭来说够用了。