300-435 Question #94: Real Exam Question with Answer & Explanation

Question

What is a benefit of software-defined networks when compared to traditional network?

Options

• AThey improve information capture from the network by enabling model-driven telemetry, whereas traditional networks use SNMP for capturing logs from devices.
• BThey facilitate network management by replacing network services that run on dedicated hardware, whereas traditional networks use networking platforms to run and enforce policies.
• CThey simplify operations by providing policy enforcement across physical and virtual environments, whereas traditional network configuration occurs on the physical infrastructure.
• DThey reduce costs by enabling network functions to run on commodity servers, whereas traditional network functions run on physical servers.

Explanation

Software-defined networks (SDN) offer benefits over traditional networks by facilitating management through the replacement of dedicated hardware-based network services with software-driven alternatives.

Common mistakes.

• A. While SDN often integrates with model-driven telemetry for improved data capture, this is a feature, not the primary benefit of replacing network services which is highlighted in the correct answer.
• C. While SDN does provide policy enforcement across physical and virtual environments and simplifies operations, the core benefit often emphasized is the abstraction and centralization, which enables services to be delivered differently.
• D. SDN can reduce costs by enabling network functions on commodity servers (NFV), but the question asks about a benefit of SDN compared to traditional networks, and option B describes a more foundational difference in how network services are managed and delivered.

Concept tested. Benefits of Software-Defined Networking (SDN)

Reference. https://www.cisco.com/c/en/us/solutions/software-defined-networking/what-is-sdn.html

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