I was looking at new routers to buy and didn't understand how speed exactly works. This router has 300 mbps wireless, but wan/lan port only supports 100 mbps. So the ethernet cable that comes from my cable modem into router's WAN port will only support 100 mbps, then how can router provide 300 mbps? I assume if I was to transfer files from 2 wireless devices, I can achieve that speed but for internet speed is it possible?
Second question is I currently have gigabit router and getting around 120 mbps but I have to replace it because it's wireless is unstable, gigabit routers are more expensive so if I buy a 100 mbps router, can I get around 90 mbps internet wired?
*Had another idea: My current router works fine for wired connections, only wireless is problematic. Can I still use my old router directly connected to my main PC wired, and use another ethernet cable from old router to new 100 mbps router and distribute wifi from new one?