Which of the following is the unit used to transfer information at Layer 2 of the OSI model?

The correct answer is D. Frame. The OSI model defines a specific Protocol Data Unit (PDU) for each layer. Layer 2 (Data Link) uses Frames. A frame encapsulates the packet from Layer 3 and adds a header containing source and destination MAC addresses, along with a trailer for error checking (FCS). The other…

Networking concepts

Question

Options

APacket
BSocket
CSession
DFrame

How the community answered

(48 responses)

A
2% (1)
B
6% (3)
C
2% (1)
D
90% (43)

Explanation

The OSI model defines a specific Protocol Data Unit (PDU) for each layer. Layer 2 (Data Link) uses Frames. A frame encapsulates the packet from Layer 3 and adds a header containing source and destination MAC addresses, along with a trailer for error checking (FCS). The other options belong to different layers: Packets are the PDU for Layer 3 (Network), Segments/Datagrams for Layer 4 (Transport), and Sessions are a concept of Layer 5 (Session). 'Socket' is not an OSI PDU term.

Topics

#OSI model#Layer 2#data encapsulation#frames

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