In TCP/IP Reference model, the job of _______ layer is to permit hosts to…
2016
In TCP/IP Reference model, the job of _______ layer is to permit hosts to inject packets into any network and travel them independently to the destination.
Answer: D. Host-to-network — Answer: Host-to-network layer Explanation: The host-to-network (network access) layer specifies how a host places packets onto the local network and…
- A.
Physical
- B.
Transport
- C.
Application
- D.
Host-to-network
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Correct answer: D
Answer: Host-to-network layer
Explanation: The host-to-network (network access) layer specifies how a host places packets onto the local network and interfaces with the underlying physical and link technologies. It is responsible for framing, link-level addressing, and access to the medium, which allows hosts to inject packets into a network.
Related role of the Internet layer:
The Internet (network) layer (IP) is responsible for forwarding datagrams across multiple networks so they can travel independently to their destinations. In combination, the host-to-network layer and the Internet layer enable injection of packets and their independent delivery across networks.
Why Physical is incorrect: The Physical layer only transmits raw bits over a medium and does not handle packet framing, addressing, or network access decisions.
Why Transport is incorrect: The Transport layer provides end-to-end communication services (reliability, flow control, ports) but does not place packets onto networks or perform forwarding across networks.
Why Application is incorrect: The Application layer offers user-facing network services and protocols; it does not manage how packets are injected into or forwarded across networks.