What is the OSI reference model?
This is an example of a fundamental networking question that every Computer Network architect should be familiar with and able to answer. Not knowing this information could result in the interview being terminated immediately. This is why it's a good idea to review all the common networking terms, technologies, processes, and procedures before the interview. If there's something you're not familiar with or are uncomfortable talking about, you should spend additional time preparing to answer the question. Practicing questions like these and answering them aloud will help you prepare for the interview and be comfortable when asked.
Since this question only asks you to define the OSI model, limit your answer to the definition. You can expand on it a little by talking about the number of layers in the model and its use. Because this topic is extremely important to network architects, you can anticipate being asked one or more follow-up questions.
"The Open System Interconnections or OSI model is a network architecture model based on International Standards Organization standards. It addresses connecting systems that are open for interaction with other systems. The OSI model has seven layers. The model enabled the creation of a new layer if a different abstraction was needed and each layer having a defined function based on internationally standardized protocols."
