Why was the TCP/IP model designed with fewer layers than OSI?
2025
Why was the TCP/IP model designed with fewer layers than OSI?
- A.
To increase protocol overhead
- B.
To reflect real-world implementation pragmatism
- C.
To enforce government regulations
- D.
To prioritize theoretical completeness
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Correct answer: B
The OSI Approach (Theoretical): The Open Systems Interconnection model was built as an academic exercise. The designers mapped out every conceivable service a network could offer and isolated them into 7 strict boundaries. Because the model was built before the software existed, some layers turned out to be nearly empty or highly redundant in actual practice.
The TCP/IP Approach (Pragmatic): The TCP/IP suite was engineered by programmers who were actively building working network nodes. They grouped tasks based on how software functions are naturally implemented in an operating system's protocol stack.