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vlan 100
vlan 0
vlan 99
vlan 1
none of the answers
Rapid Per-VLAN Spanning-Tree Protocol (Rapid-PVST+) is the Rapid Spanning-Tree Protocol (802.1W) implemented on a Per-VLAN basis which means each VLAN has RSTP running on it. By default, Rapid PVST+ is the default STP mode on a Cisco switch. To answer the question, since the VLAN number is purposely removed, we have to know about Bridge IDs specifically the "sys-id-ext" field. This field is the System ID Extension, that is, the VLAN ID. The graphic shows the value of "sys-id-ext" as 100, therefore, the VLAN that this RSTP runs to is VLAN 100. (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/CLIConfigurationGuide/RPVSpanningTree.html#wp1204703)
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