How to set net.download_speed and net.upload_speed, is there a formula?

[PSYKOnz]

Ok there are many posts on the subject but none of them seem to offer a definitive answer and many are confusing, also many are very old, as old as dcs 1.5. i dont want to go necro posting so ill ask here

Im setting up my new server and i want to make sure that im dialing all my settings in

 

So how do i set the following 

net.download_speed = 1024*1024*256

net.upload_speed =

1024*1024*256

 

I want to understand these numbers

Is there a formula to figure it out?

What does each number represent?

How do i increase these numbers for better performance?

I currently have a 1gbps down 500mbps up connection that will soon be 2.5gbps semetrical, all over fiber, so i would like to make sure im getting the most from the server and connection 

Im hoping for a nice simple answer that i can understand and hopefully others can to