SSCP · Question #807
Which layer of the DoD TCP/IP model controls the communication flow between hosts?
The correct answer is B. Host-to-host transport layer. Host-to-host transport layer (B) is correct because this layer is responsible for managing end-to-end communication between hosts, including flow control, error checking, and reliable data delivery - functions handled by TCP (connection-oriented) and UDP (connectionless)…
Question
Options
- AInternet layer
- BHost-to-host transport layer
- CApplication layer
- DNetwork access layer
How the community answered
(42 responses)- A2% (1)
- B88% (37)
- C7% (3)
- D2% (1)
Explanation
Host-to-host transport layer (B) is correct because this layer is responsible for managing end-to-end communication between hosts, including flow control, error checking, and reliable data delivery - functions handled by TCP (connection-oriented) and UDP (connectionless) protocols.
- Internet layer (A) handles logical addressing and routing packets across networks (IP, ICMP) - it moves data between networks, not manages the flow between hosts.
- Application layer (C) provides protocols for user-facing services like HTTP, FTP, and DNS - it defines what data is exchanged, not how the flow is controlled.
- Network access layer (D) handles physical transmission and hardware addressing (Ethernet, MAC) - it operates at the wire level, not host-to-host communication management.
Memory tip: "Host-to-host" literally names its job - it manages the conversation between two hosts, which is exactly what flow control does. If the layer name describes who is talking, that's your flow control layer.
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