Question

How many layers are there in the ISO OSI reference model ?

• A. 7
• B. 5
• C. 4
• D. 6

Hint:

Use a mnemonic to remember the 7 layers: "Please Do Not Throw Sausage Pizza Away".

Answer 1

The Correct Option is A

Step 1: Recall the OSI model structure. The Open Systems Interconnection (OSI) model is a conceptual framework that standardizes the functions of a telecommunication or computing system in seven distinct layers.
Step 2: List the seven layers. The layers, from bottom to top, are: 1. Physical 2. Data Link 3. Network 4. Transport 5. Session 6. Presentation 7. Application There are 7 layers in total.