SSCP Question #726: Real Exam Question with Answer & Explanation

The correct answer is C: Network layer. The Network Layer (Layer 3) of the OSI model is responsible for logical addressing and routing - determining the best path for data to travel from source to destination across interconnected networks. Routers operate at this layer and use routing protocols (e.g., OSPF, BGP) to se

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

Question

Which OSI/ISO layer is responsible for determining the best route for data to be transferred?

Options

ASession layer
BPhysical layer
CNetwork layer
DTransport layer

Explanation

The Network Layer (Layer 3) of the OSI model is responsible for logical addressing and routing - determining the best path for data to travel from source to destination across interconnected networks. Routers operate at this layer and use routing protocols (e.g., OSPF, BGP) to select optimal paths. The Session Layer (Layer 5) manages sessions between applications. The Physical Layer (Layer 1) handles raw bit transmission over physical media. The Transport Layer (Layer 4) manages end-to-end communication and reliability (TCP/UDP), but does not determine routing paths.

Topics

#OSI Model#Network Layer#Routing#Networking Fundamentals

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