Which ISO/OSI layer establishes the communications link between individual devices over a physical link or channel?

The correct answer is C. Data link layer. The Data Link layer (Layer 2) of the OSI model is responsible for establishing, maintaining, and terminating the logical link between directly connected devices on the same physical network segment. It handles MAC addressing, framing, error detection (e.g., CRC), and media…

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

Question

Which ISO/OSI layer establishes the communications link between individual devices over a physical link or channel?

Options

ATransport layer
BNetwork layer
CData link layer
DPhysical layer

How the community answered

(37 responses)

A
3% (1)
B
3% (1)
C
89% (33)
D
5% (2)

Explanation

The Data Link layer (Layer 2) of the OSI model is responsible for establishing, maintaining, and terminating the logical link between directly connected devices on the same physical network segment. It handles MAC addressing, framing, error detection (e.g., CRC), and media access control (e.g., CSMA/CD). Examples include Ethernet, Wi-Fi (802.11), and PPP. The Physical layer (L1) deals with the actual transmission of raw bits over the medium (cables, signals). The Network layer (L3) handles logical addressing and routing between different networks. The Transport layer (L4) manages end-to-end delivery between hosts.

Topics

#OSI Model#Data Link Layer#Network Protocols

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