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多项选择题 Exhibit SW1#show spanning-tree vlan 200 VLAN200 Spanning tree enabled protocol iee eRoot ID Priority 32968 Address 000c.ce29.ef00 Cost 19 Port 2 （FastEthernet0/2） Hello time 10 Sec Max Age 20 sec Forward Delay 30 sec  Bridge ID Priority 32968 （priority 32768 sys-id-ext 200） Address 000c.ce2a.4180 Hello Time 2 sec Max Age 20 Sec Forward Delay 15 sec  Interface Role Sts Cost PrioNbr Type Fa0/2 Root FWD 19 128.2 P2p Fa0/3 Altn BLK 19 128.3 P2p   Based on the show spanning-tree vlan 200 output shown in the exhibit， which two statementsabout the STP process for VLAN 200 are true？（）

A、BDPUs will be sent out every two seconds

B、The time spent in the listening state will be 30 seconds

C、The time spent in the learning state will be 15 seconds

D、The maximum length of time that the BPDU information will be saved is 30 seconds

E、This switch is the root bridge for VLAN 200

F、BPDUs will be sent out every 10 seconds

  • B,F

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