Could you name the main network protocols you encounter or have used in practice?

The main network protocols commonly encountered in Node.js development include:

• HTTP/HTTPS — protocols for hypertext transfer, the foundation of web communication.
• TCP — a transport layer protocol that ensures reliable data transfer.
• UDP — a connectionless transport layer protocol used for fast data transmission.
• WebSocket — a protocol for bidirectional communication between client and server over TCP.
• DNS — a protocol for resolving domain names into IP addresses.

For example, when creating a web server in Node.js, HTTP/HTTPS are most commonly used, and WebSocket for real-time communication.