A server is a computer with a simple, important job: it waits for other computers to ask for something, and then it sends it back.
When you open a website, your device is the client. The client asks. The server answers. That back-and-forth is how almost everything online works.
Servers store and send all kinds of things: websites, videos, files, email, and the data inside your favorite apps.
You can think of a server as a super-helpful computer that is always awake and ready to respond, even in the middle of the night.
Because so much depends on them, real servers are looked after carefully. People keep them updated, make backups in case something breaks, and protect them so only the right people can get in.
So the next time a page appears on your screen, remember: a server somewhere just heard your browser ask, and answered.
What to remember
- A server is a computer that stores things and sends them when asked.
- Your browser is the client: it asks. The server answers.
- Servers power websites, videos, files, email, and apps.
- Good servers stay updated, backed up, and protected.
Words to know
- Server
- A computer that waits for requests and sends back what was asked for.
- Client
- The device that asks, like your browser or phone.
- Request
- A message asking the server for something.
- Response
- The reply the server sends back.
For grown-ups
A server is any computer (or program) that listens for requests and returns responses. The browser is the client; the server hosts the website, files, or API. Real servers focus on being reliable and secure: updates, backups, access controls, monitoring, and HTTPS keep them and their data safe.
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