Exam 200-120 Question id=87 LAN Switching Technologies

switch#show spanning-tree interface gigabitEthernet 0/1 Vlan Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- VLAN0001 Root FWD 4 128.25 P2p VLAN0099 Alnt BLK 4 128.25 P2p VLAN0110 Root FWD 4 128.25 P2p

Given the output, what is the reason that interface gigabitEthernet 0/1 is not the root port for VLAN 99?

A. This switch has more than one interface connected to the root network segment in VLAN 99.
B. This switch is running RSTP while the elected designated switch is running 802.1d Spanning Tree.
C. This switch interface has a higher path cost to the root bridge than another in the topology.
D. This switch has a lower bridge ID for VLAN 99 than the elected designated switch.

These four parameters are examined in order to make root bridge, root port, designated port. Other switch has lowest Sending Bridge ID or Sending Port ID so vlan 2 is not the root port.
1. A lower Root Bridge ID
2. A lower path cost to the Root
3. A lower Sending Bridge ID
4. A lower Sending Port ID


the answers are mixed, do not specify in the comment number or the letter of the answer
please write answer#A instead A, answer#B instead B...

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