Why the lag in online servers?

[IceFire]

Originally Posted by Black_Sage29

I usually play On LAN network settings since that's the fastest speed

I always thought setting it to ISDN would cause things to slow down

Changes how the packets are handled and it might reduce the overhead required to process them. In some cases it could provide a performance increase. You can easily experiment and then if it provides no tangible benefit then you can always switch back.