300-320 Question #217: Real Exam Question with Answer & Explanation

The correct answer is A: Cisco NSF with SSO and redundant supervisors has the most impact on the campus in the. Answer A is correct. Cisco NSF (Non-Stop Forwarding) with SSO (Stateful Switchover) combined with redundant supervisor modules at the Distribution layer has the most significant positive impact on the Campus network during a failover event - it prevents a Spanning Tree topology c

Question

Which of the following is true concerning best design practices at the switched Access layer of the traditional layer2 Enterprise Campus Network?

Options

ACisco NSF with SSO and redundant supervisors has the most impact on the campus in the
BProvide host-level redundancy by connecting each end device to 2 separate Access switches
COffer default gateway redundancy by using dual connections from Access switches to redundant
DInclude a link between two Access switches to support summarization of routing information from

Explanation

Answer A is correct. Cisco NSF (Non-Stop Forwarding) with SSO (Stateful Switchover) combined with redundant supervisor modules at the Distribution layer has the most significant positive impact on the Campus network during a failover event - it prevents a Spanning Tree topology change that would otherwise cause all Access layer hosts to re-learn MAC addresses and potentially lose connectivity. Option B is incorrect; dual-homing each end device to two separate Access switches is costly and unusual - dual uplinks from Access to Distribution is the standard. Option C is a valid practice (using HSRP/VRRP for gateway redundancy), but it is not the most impactful best practice listed. Option D is incorrect; links between Access layer switches for route summarization are not a Layer 2 campus best practice and introduce unnecessary complexity.

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