Question

List each layer of the OSI model and its corresponding PDU (protocol data unit).

Answer 1

The OSI model consists of seven layers, each with its specific function and Protocol Data Unit (PDU). From the Application layer (Layer 7) with PDU 'Data', down to the Physical layer (Layer 1) with PDU 'Bit', each layer prepares data for transmission or processes incoming data.

Step-by-step explanation:

OSI Model Layers and Corresponding PDUs

The Open Systems Interconnection (OSI) model is a conceptual framework used to understand network communication by dividing it into seven layers. Each layer of the OSI model has a specific function and its own Protocol Data Unit (PDU). Here is a list of each OSI layer along with its corresponding PDU:

1. Layer 7: Application Layer - PDU: Data
2. Layer 6: Presentation Layer - PDU: Data
3. Layer 5: Session Layer - PDU: Data
4. Layer 4: Transport Layer - PDU: Segment (TCP) or Datagram (UDP)
5. Layer 3: Network Layer - PDU: Packet
6. Layer 2: Data Link Layer - PDU: Frame
7. Layer 1: Physical Layer - PDU: Bit

Each PDU represents a specific form of data that is processed as the communication moves through the layers of the OSI model.