#protocols

Most MCP tutorials stop at hello-world. Then you try to run one on the open internet with real auth, real load, and real attackers, and every assumption breaks. Here are the five design decisions that actually decide whether your server survives production.

TCP guarantees your data arrives, in order, or dies trying. UDP just fires packets and hopes. Here is why streaming, games, DNS, and even the modern web quietly run on the one everyone calls 'unreliable'.