Optimized Connection

The best settings for an optimized connection is very simple, just follow what this says and make sure you do everything correctly, Ok.

TCPNoDelay = "1"
TcpAckFrequency = "1"
TcpDelAckTicks = "1"
Now that we've finished with that, there is also a TCP no delay mod at https://github.com/prplz/TcpNoDelayMod/releases go here if you want to have a bit smoother connection on servers.
DNS: Dns only changes your TICK order in the server, this means you can be placed in order from 1-100, Use 75.75.75.75 | 75.75.76.76. This is a home DNS that everyone gets, use it as this is helpful.
Lag: Make sure all programs that can cause lag are closed, Ex: Skype,Chrome,etc. It's recommended that if you want any music to listen to, you should make a playlist and download them to your computer so you run into no problems.
MTU: There are several tutorials on 'how to find the best MTU', Just look up a video and follow everything they say and do, after that you should be updated with your new MTU and everything should be set.
Lastly: Make sure you have a good ISP, XFinity is a very good ISP for anyone in the US, every country has their "Best" ISP, make sure you have that for the BEST gaming experience.
Completed, you've done everything correct and you're now ready for the smoothest gaming experience, Restart your pc, load minecraft, Open a cmd ping your favorite server, and you'll see a difference, Have a good day!