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

Question

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

• A
  79% (31)
• B
  5% (2)
• C
  13% (5)
• D
  3% (1)

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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