What is the TCP/IP reference model and its layers?
This question requires detailing the four-layer architecture of the Internet protocol suite. It tests your structural understanding of network communication.
Why Interviewers Ask This
The TCP/IP model is the foundation of modern networking. Interviewers want to ensure you know how data flows across layers and what protocols belong to each. This is essential for debugging network issues and designing scalable systems.
How to Answer This Question
List the four layers: Application, Transport, Internet, and Network Interface. Explain the function of each layer concisely. Mention key protocols per layer (HTTP, TCP, IP, Ethernet). Compare briefly with the OSI model if helpful. Focus on encapsulation and decapsulation processes.
Key Points to Cover
- Four layer definitions
- Key protocols per layer
- Encapsulation process
- Comparison with OSI
Sample Answer
The TCP/IP model consists of four layers: Application, Transport, Internet, and Network Interface. The Application layer handles high-level protocols like HTTP and FTP. The Transport layer manages end-to-end communicatio…
Common Mistakes to Avoid
- Listing seven layers instead of four
- Mixing up transport protocols
- Vague descriptions of functions
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