What is the default spanning-tree mode of an NNI port on a Cisco ME3400 switch?
A.
multiple spanning tree (mst)
B.
per-vlan rapid spanning tree (rapid-pvst)
C.
per-vlan spanning tree (pvst)
D.
IEEE 802.1D (stp)
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http://www.cisco.com/c/en/us/td/docs/switches/metro/me3400/software/release/12-2_25_seg_seg1/configuration/guide/3400scg/swstp.html#wp1166029
Rapid PVST+—This spanning-tree mode is the same as PVST+ except that is uses a rapid convergence based on the IEEE 802.1w standard. This is the default spanning-tree mode for the Cisco ME switch NNIs.
correct is B
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