GPEN Question #260: Real Exam Question with Answer & Explanation

The correct answer is D. Link layer. The Link layer of the TCP/IP model is responsible for frame delivery between hosts that share the same physical network link or segment.

Question

Which of the following layers of TCP/IP model is used to move packets between the Internet Layer interfaces of two different hosts on the same link?

Options

AInternet layer
BApplication layer
CTransport Layer
DLink layer

Explanation

The Link layer of the TCP/IP model is responsible for frame delivery between hosts that share the same physical network link or segment.

Common mistakes.

A. The Internet layer is responsible for logical addressing and routing packets across multiple different networks, not for delivery within a single link.
B. The Application layer provides protocols and interfaces for end-user applications such as HTTP and FTP, and plays no role in packet movement between hosts.
C. The Transport layer provides end-to-end communication services including segmentation, flow control, and reliability, but does not handle same-link packet delivery between interfaces.

Concept tested. TCP/IP Link layer same-link packet delivery role

Reference. https://www.rfc-editor.org/rfc/rfc1122

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