system
A chat on subreddit /r/pcmasterrace
human
excellent explanation but my problem with asus is they just market it as "Gaming" router, No lags!, win more games! that kind of marketing
gpt
There's some truth to it though.  It can set up NAT types for specific games that you'd play online so that you actually will get a better connection.  The perk is that it only leaves those ports open when you play that game (it sniffs network traffic), so it's a bit safer.

Personally, NAT type B is more than enough for online gaming.  NAT type A requires port forwarding and I'm not a fan of leaving ports open to the internet.