How Do Computer Networks Work? TCP/IP, the OSI Model and the Protocols Every Programmer Uses

Tue, 20 Oct 2026 18:00:00 +0000

Very few programs work alone. A web page fetches data from an API, the API queries a database on another machine, the database replicates to a third, and all of them ask a time server what time it is and a name server where everyone else lives. Every one of those conversations crosses a network, and every one of them can be slow, fail halfway or arrive in pieces. A programmer who understands what happens between connect() and the reply can tell a DNS problem from a TLS problem from a congested link, and can write code that copes with all three.

OSI Model on Artur Rios Lab

How Do Computer Networks Work? TCP/IP, the OSI Model and the Protocols Every Programmer Uses