Network Protocols: A Seemingly Simple Miracle

This article provides a clear explanation of the network protocol stack, from reliable data transmission to the intricacies of the physical layer hardware, revealing its surprising complexity and ingenuity. Using an 88.5MB video download as an example, it illustrates how protocols like IP, TCP, and Ethernet work together to overcome network instability and packet loss, ultimately achieving reliable and efficient data transmission. The author reveals the complex routing algorithms, congestion control, and packet reassembly techniques hidden behind seemingly simple network operations, as well as the interdependencies and constraints between various protocols, and explains why the Ethernet packet size is set to 1500 bytes and other historical issues.