Arrange the following in the correct order in the context of OSI model (from bottom to top).
A. Network layer
B. Physical layer
C. Presentation layer
D. Data link layer
E. Application layer
Choose the correct answer from the options given below:

Correct option is C

The OSI (Open Systems Interconnection) model consists of seven layers arranged from the lowest to the highest as Physical, Data Link, Network, Transport, Session, Presentation and Application.
When arranging the given layers from bottom to top, the Physical layer comes first, followed by the Data Link layer, which is responsible for reliable node-to-node frame delivery. Above it is the Network layer, which handles logical addressing and routing. The Presentation layer performs functions such as data translation, encryption and compression, while the Application layer provides network services directly to applications.
Information Booster
1. Physical Layer (B)
· It is the lowest layer of the OSI model.
· Deals with transmission of raw bits over the physical medium.
· Defines electrical, mechanical and signaling characteristics.
· Examples include cables, connectors, hubs, repeaters, and physical signaling specifications.
2. Data Link Layer (D)
· It is directly above the Physical layer.
· Responsible for framing and node-to-node delivery.
· Performs functions such as MAC addressing, error detection, and flow control in appropriate protocols.
· It is commonly divided into Logical Link Control (LLC) and Media Access Control (MAC) sublayers.
3. Network Layer (A)
· Provides logical addressing and routing of packets between different networks.
· Determines suitable paths for packet delivery.
· IP (Internet Protocol) operates primarily at this layer.
· Routers are commonly associated with the Network layer.
4. Presentation Layer (C)
· Responsible for the representation and transformation of data.
· Provides functions such as data translation, encryption/decryption, and compression/decompression.
· It ensures that data presented by one system can be interpreted appropriately by another system.
5. Application Layer (E)
· It is the highest layer of the OSI model.
· Provides network-related services to end-user applications.
· Examples of protocols associated with this layer include HTTP, FTP, SMTP, and DNS.
Additional Knowledge
· The complete OSI order from bottom to top is:
Physical → Data Link → Network → Transport → Session → Presentation → Application