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spanning-tree关于listening and learning time 如何 adjust and change a mount of time？
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In a listening activity, students are asked to note down the time and places of events. The__________aim of this activity is to develop the skill of
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关于STP端口状态，下列说法正确的有（）。A、当端口处于Listening状态时，会接收配置BPDU并进行计算，但是不发送配置BPDUB、当端口处于Learning状态时，开始学习MAC地址，但是不转发数据C、无论端口最终确定何种角色，在Listening状态和Learning状态停留的时间都为一个Forward Delay时长D、当端口处于Listening状态和Learning状态时，如果端口角色变为Alternate端口，则该端口状态会直接转变为Blocking
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一个状态为Blocking的端口，如果要转入Forwarding状态，所要经过的状态依次为（）A、Disabled，LearningB、Listening，LearningC、Learning，ListeningD、Listening，Disabled
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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 secondsB、The time spent in the listening state will be 30 secondsC、The time spent in the learning state will be 15 secondsD、The maximum length of time that the BPDU information will be saved is 30 secondsE、This switch is the root bridge for VLAN 200F、BPDUs will be sent out every 10 seconds
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Which two statements concerning STP state changes are true？ （）A、Upon bootup，a port transitions from blocking to forwarding because it assumes itself as root.B、Upon bootup，a port transitions from blocking to listening because it assumes itself as root.C、Upon bootup，a port transitions from listening to forwarding because it assumes itself as root.D、If a forwarding port receives no BPDUs by the max_age time limit， it will transition to listening.E、If a forwarding port receives an inferior BPDU， it will transition to listening.F、If a blocked port receives no BPDUs by the max_age time limit， it will transition to listening.
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Which command enhances the 802.1D convergence time on ports that are connected to hosts?（）A、spanning-tree backbonefastB、spanning-tree uplinkfastC、spanning-tree portfastD、spanning-tree cost512
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单选题In a listening class, a teacher asks students to listen to the material carefully and try to discriminate the speaker's attitude towards lifelong learning. What sub-skill of listening is the teacher training?A
Listening for gist.B
Word Guessing.C
Inferring.D
Recognizing communicative signals.
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