Every click, message, and API call on the internet relies on network protocols. They define how data moves, who can talk, and how securely it all happens.

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Network protocols form the foundation of internet communication, defining how data moves securely between systems. Transport protocols like TCP, UDP, and QUIC handle reliable and fast delivery. Application layer protocols including HTTP, TLS, DNS, SSH, and WebSocket enable web browsing, security, remote access, and real-time communication. Backend protocols like DHCP, NTP, and LDAP manage addressing, synchronization, and directory services. The guide covers 8 popular protocols in detail: FTP, TCP, UDP, HTTP, HTTP/3, HTTPS, SMTP, and WebSocket, explaining their specific roles in data transfer and communication.

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