Which statement is/are true about the OSI model? I. Layer 1 through 3 are…
2021
Which statement is/are true about the OSI model?
I. Layer 1 through 3 are end-to-end
II. Layer 4 through 7 are chained
Answer: D. Neither I nor II — ❌ Statement I: “Layer 1 through 3 are end-to-end” This is false. Layers 1–3 (Physical, Data Link, Network) are hop-by-hop, not end-to-end. They handle…
- A.
Only I
- B.
Only II
- C.
Both I and II
- D.
Neither I nor II
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Correct answer: D
❌ Statement I: “Layer 1 through 3 are end-to-end”
This is false.
Layers 1–3 (Physical, Data Link, Network) are hop-by-hop, not end-to-end.
They handle transmission between adjacent devices (like routers).
End-to-end communication is mainly handled by higher layers (especially Layer 4).
❌ Statement II: “Layer 4 through 7 are chained”
This is also false.
Layers 4–7 (Transport, Session, Presentation, Application) are actually end-to-end layers, not “chained.”
The term “chained” is not a standard or correct description in the OSI model context.
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