400-007: Cisco Certified Design ExpertDemo

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QuestionQ1

Network Design

Which two attributes are associated with 802.1s?

Choose two
  • A 802.1s provides for faster convergence over 802.1D and PVST+
  • B 802.1s is a Cisco enhancement to 802.1w
  • C 802.1s supports up to 1024 instances of 802.1w
  • D 802.1s maps multiple VLANs to the same spanning-tree instance
  • E CPU and memory requirements are the highest of all spanning-tree STP implementations
Explanation

IEEE 802.1s Multiple Spanning Tree Protocol uses the rapid-convergence behavior of IEEE 802.1w and lets several VLANs be assigned to the same spanning-tree instance. This reduces the number of spanning-tree calculations and associated resource use compared with maintaining an instance per VLAN.

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