What a server is, how it works, hosting, ports, and the client-server model.
A server is just a computer that does a job for other computers. Learn what a server really is, how it differs from your laptop, the kinds of servers you'll meet, and why everything online depends on them — explained simply, from zero.
Almost everything online is a conversation between a server and a client. Learn exactly what each side does, how they differ, where your code actually runs, and why knowing which is which saves you from a whole class of confusing bugs.
Servers are named after the job they do, not the box they run on. Walk through the main types of servers — web, application, database, file, mail, DNS, proxy, and more — with plain explanations of what each one is for and how they fit together.
What actually happens inside a server between the moment a request arrives and the moment a response goes back? Follow the whole journey — listening on a port, accepting a connection, handling the request, building a response — explained simply, with diagrams.
Localhost is the version of your app that only you can reach; production is the version the whole world hits. Learn what really separates the two, why 'it works on my machine' happens, and what changes the moment your code goes live — explained from zero.
An IP address is a computer's location on a network; a port is the specific door on that computer where a service is listening. Learn what both really are, how IPv4 and IPv6 differ, what a socket is, and why localhost:3000 works the way it does — explained from zero.
Computers talk in numbers, but you type names. DNS is the system that turns a domain like example.com into the address of a real server. Learn what a domain actually is, how DNS lookups work step by step, what the common record types do, and why a fresh domain takes time to 'go live' — explained.
Hosting is renting space on a server that's always on, so your website is reachable by anyone, any time. Learn what web hosting really means, how a request reaches a hosted site, what you're actually paying for, and the main kinds of hosting — explained from zero.
Shared, VPS, dedicated, and cloud hosting all put your site online — but they share the underlying machine very differently. Learn what separates them, the trade-offs in cost, control, and isolation, and how to pick the right one without overpaying or outgrowing it.
A server is built from the same kinds of parts as any computer — CPU, RAM, storage, network — just chosen and arranged for round-the-clock work. Learn what each component does, why server-grade parts differ from a laptop's, and how to read a spec sheet without guessing.
Underneath every website and app lives an operating system quietly keeping the server alive. Learn what a server OS really is, how it differs from the one on your laptop, why most servers run Linux, and the jobs it handles — explained simply, from zero.
Client-server architecture is the pattern that organizes nearly everything online into a side that asks and a side that answers. Learn how the model is structured, why apps get split into tiers, where logic and data belong, and how this blueprint scales from one user to millions.