SSCP · Question #1012
Layer 4 of the OSI stack is known as:
The correct answer is B. the transport layer. Layer 4 of the OSI (Open Systems Interconnection) model is officially designated as the Transport Layer, responsible for end-to-end communication and data segmentation.
Question
Layer 4 of the OSI stack is known as:
Options
- Athe data link layer
- Bthe transport layer
- Cthe network layer
- Dthe presentation layer
How the community answered
(26 responses)- A4% (1)
- B92% (24)
- C4% (1)
Why each option
Layer 4 of the OSI (Open Systems Interconnection) model is officially designated as the Transport Layer, responsible for end-to-end communication and data segmentation.
The data link layer is Layer 2 of the OSI model, responsible for node-to-node data transfer and error correction from the physical layer.
The Transport Layer (Layer 4) of the OSI model is responsible for reliable data transfer between end systems, managing segment sequencing, acknowledgment, and flow control. Protocols like TCP and UDP operate at this layer to ensure end-to-end communication.
The network layer is Layer 3 of the OSI model, responsible for logical addressing and routing packets across different networks.
The presentation layer is Layer 6 of the OSI model, responsible for data formatting, encryption, and compression for the application layer.
Concept tested: OSI Model Layer 4 identification
Source: https://learn.microsoft.com/en-us/windows/win32/winsock/open-systems-interconnection-osi-model
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