Arrange the following OSI layers in correct sequence:
(A) Data link layer
(B) Physical layer
(C) Network layer
(D) Presentation layer
(E) Application layer
Choose the correct answer from the options given below:
Correct Answer :
B, A, C, D, E
Solution :
The correct option is B, A, C, D, E.
The Open Systems Interconnection (OSI) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven distinct layers. These layers are typically ordered from the lowest layer (Layer 1, closest to the physical transmission medium) to the highest layer (Layer 7, closest to the end-user application).
Let us arrange the given OSI layers in order from bottom (Layer 1) to top (Layer 7):
1. Physical Layer (B): This is Layer 1, which is responsible for the electrical, mechanical, and physical transmission of raw, unstructured bit streams over a transmission medium.
2. Data Link Layer (A): This is Layer 2, which packages raw bits into frames and handles node-to-node transfer, flow control, and error detection.
3. Network Layer (C): This is Layer 3, which is responsible for packet forwarding, routing paths, and logical addressing (e.g., IP addresses).
4. Presentation Layer (D): This is Layer 6, which translates, encrypts, and compresses data, formatting it in a syntax that the application layer can understand.
5. Application Layer (E): This is Layer 7, the topmost layer that interacts directly with user software applications to provide networking services like web browsing or email.
By arranging the given layers in order from the lowest layer up to the highest layer, we get the sequence:
Physical (B) ⇒ Data link (A) ⇒ Network (C) ⇒ Presentation (D) ⇒ Application (E).
This corresponds to the sequence B, A, C, D, E.
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