多项选择题
Which two statements are true when the extended system ID feature is enabled？ （）
A.The BID is made up of the bridge priority value（two bytes） and bridge MAC address （six bytes）.
B.The BID is made up of the bridge priority （four bits）， the system ID （12 bits）， and a bridge MAC address （48 bits）.
C.The BID is made up of the system ID （six bytes） and bridge priority value （two bytes）.
D.The system ID value is the VLAN ID （VID）.
E.The system ID value is a unique MAC address allocated from a pool of MAC addresses assigned to the switch or module.
F.The system ID value is a hex number used to measure the preference of a bridge in the spanning-tree algorithm.
相关考题
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多项选择题
Based on the show spanning-tree vlan 200 output shown in the exhibit， which two statements about the STP process for VLAN 200 are true？ （）
A.BPDUs 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. -
单项选择题
Whichrouterredundancyprotocolcannotbeconfiguredforinterfacetracking？（）
A.HSRP
B.GLBP
C.VRRP
D.SLB
E.RPR
F.RPR+ -
多项选择题
WhichthreestatementsaboutSTPtimersaretrue？（）
A.STP timers values （hello， forward delay， max age） are included in each BPDU.
B.A switch is not concerned about its local configuration of the STP timers values. It will only consider the value of the STP timers contained in the BPDU it is receiving.
C.To successfully exchange BPDUs between two switches， their STP timers value （hello， forward delay， max age） must be the same.
D.If any STP timer value （hello， forward delay， max age） needs to be changed， it should at least be changed on the root bridge and backup root bridge.
E.On a switched network with a small network diameter， the STP hello timer can be tuned to a lower value to decrease the load on the switch CPU.
F.The root bridge passes the timer information in BPDUs to all routers in the Layer 3 configuration.
