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A TCP server is a program that:
It acts like a central hub where all communication begins.
How It Works (Simple Flow)
| const net = require('net'); const server = net.createServer((socket) => { console.log('Client connected'); // Receiving data from client socket.on('data', (data) => { console.log('Received:', data.toString()); }); // When client disconnects socket.on('end', () => { console.log('Client disconnected'); }); // Sending response socket.write('Welcome to the server!'); }); server.listen(3000, () => { console.log('Server is listening on port 3000'); }); |
Every new client gets its own socket connection
Event | Meaning |
| data | Data received from client |
| end | Client disconnected |
| error | Something went wrong |
A TCP server is the starting point of real-time communication.
It listens, connects, and manages multiple clients all at once.
Once your server is running, you’ve built the foundation of any real-time system.
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What is a TCP Server?
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