II0-001 · Question #165
In the OSI stack, which layer is associated with TCP transmissions?
The correct answer is C. The transport layer. TCP operates at Layer 4, the Transport layer, which is responsible for end-to-end communication, flow control, error recovery, and segmentation of data between hosts - all core functions of TCP. The Application layer (A) is Layer 7 and handles protocols like HTTP and DNS, not…
Question
In the OSI stack, which layer is associated with TCP transmissions?
Options
- AThe application layer
- BThe data link layer
- CThe transport layer
- DThe network layer
How the community answered
(51 responses)- A4% (2)
- B16% (8)
- C73% (37)
- D8% (4)
Explanation
TCP operates at Layer 4, the Transport layer, which is responsible for end-to-end communication, flow control, error recovery, and segmentation of data between hosts - all core functions of TCP. The Application layer (A) is Layer 7 and handles protocols like HTTP and DNS, not raw transmission mechanics. The Data Link layer (B) is Layer 2 and deals with MAC addressing and frame delivery between directly connected devices on the same network. The Network layer (D) is Layer 3 and handles logical IP addressing and routing between networks - IP lives here, not TCP. Memory tip: Think "TCP = Transport" - both start with T, and Transport is the only layer whose job is to reliably transport data between two endpoints.
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