300-435 Question #140: Real Exam Question with Answer & Explanation

Question

How do traditional versus software-defined networks compare?

Options

• ASoftware-defined networks support the use of Intent APIs, and traditional networks are typically hardware-based.
• BSoftware-defined networks enable the use of distributed network configurations, and traditional networks are centralized.
• CTraditional networks use dynamic access lists, and software-defined networks need individual hardware to be programmed.
• DTraditional networks provide centralized network management, and software-defined networks rely on devices.

Explanation

Software-defined networks (SDNs) offer programmatic control through APIs, while traditional networks primarily rely on device-specific, hardware-based configurations.

Common mistakes.

• B. Software-defined networks typically centralize control logic in a controller that then programs the distributed data plane, while traditional networks often involve distributed, per-device configurations.
• C. While traditional networks can use dynamic access lists, the statement that 'software-defined networks need individual hardware to be programmed' is misleading as the SDN controller typically programs the hardware centrally, rather than requiring manual individual programming.
• D. This statement is reversed; software-defined networks provide centralized management through a controller, while traditional networks often rely on device-by-device configuration.

Concept tested. Traditional vs. Software-Defined Networking (SDN)

Reference. https://www.cisco.com/c/en/us/solutions/collateral/enterprise-networks/software-defined-access/guide-c07-740702.html

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