Describe the four layers of the TCP/IP Reference Model.
This networking question tests knowledge of the standard protocol stack used for internet communication.
Why Interviewers Ask This
Understanding the network stack is crucial for debugging connectivity issues and optimizing data transmission. Interviewers expect candidates to know how data moves from the application layer down to the physical hardware.
How to Answer This Question
List the layers from top to bottom: Application, Transport, Internet, Network Interface. Briefly explain the function of each layer. Mention key protocols associated with each (HTTP, TCP/UDP, IP, Ethernet). Contrast briefly with the OSI model if helpful, but focus on TCP/IP.
Key Points to Cover
- Layer hierarchy
- Function of each layer
- Key protocols per layer
- Routing vs transmission
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
- Confusing with OSI layers
- Missing the interface layer
- Incorrect protocol mapping
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