Which layer of the OSI/ISO model handles physical addressing, network topology, line discipline, error notification, orderly delivery of frames, and optional flow control?

The correct answer is B. Data link. The Data Link layer (Layer 2) of the OSI model handles physical/MAC addressing, network topology awareness, line discipline (controlling which device may transmit), error notification, orderly delivery of frames, and optional flow control. The Physical layer (Layer 1) deals only

Submitted by suresh_in· Apr 18, 2026Network and Communications Security

Question

Options

APhysical
BData link
CNetwork
DSession

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(25 responses)

A
4% (1)
B
92% (23)
C
4% (1)

Explanation

The Data Link layer (Layer 2) of the OSI model handles physical/MAC addressing, network topology awareness, line discipline (controlling which device may transmit), error notification, orderly delivery of frames, and optional flow control. The Physical layer (Layer 1) deals only with raw bit transmission and electrical/optical signaling. The Network layer (Layer 3) manages logical addressing and routing between networks. The Session layer (Layer 5) manages communication sessions between applications - none of these match the listed responsibilities.

Topics

#OSI Model#Data Link Layer#Networking Fundamentals#Physical Addressing

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