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A network protocol defines a formal set of rules, conventions and message formats that enable communication between devices. It covers layered architectures, error handling, state models and security mechanisms, thereby shaping performance, interoperability and system design decisions.
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A network protocol defines rules and formats for devices to exchange messages, interpret states, and handle errors.
Protocols grew from the need for interoperability across heterogeneous networks; the IETF documents them in RFCs.
Like conversation rules, both sides need the same language, turns, and acknowledgements.
Syntax defines structure, fields, and encoding.
Semantics defines the meaning of a message or field.
State rules define order, acknowledgements, and errors.
Protocol understanding connects packet structure, sequence, and meaning, enabling interoperability and focused troubleshooting.
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