Why do people recommend DIY routers?
Why do people recommend DIY routers?
Also not accurate. For advanced networking beyond VPN or NAS capabilities, consider truely advanced Cisco routers or specialized Mikrotik models. I don't rely on pfSense; based on my work with OpenWRT and iKuai, network functionalities are quite straightforward on x86 systems, though they fall short of the performance and efficiency of professional routers.
I don't want to explain how packets work from scratch, but since you don't want to Google, I will briefly explain. The biggest packet for your programs to send is 1518, the smallest is 64. How big the packets depend on what programs are sending them. For example, games usually send very small packet, video and download usually send big packet. The more real-time, low latency the program requires, the smaller the packets are. The best way to measure the performance of a router is testing how it handles small packets.