其他
Refer to the exhibit. Based on the information given. Which switch will be elected root bridge and why?()A.Switch A ,because it has the lowest MAC addressB.Switch C,because it has the lowest priorityC.Switch B,because it has the highest MAC addressD.Switc
题目
A.Switch A ,because it has the lowest MAC address
B.Switch C,because it has the lowest priority
C.Switch B,because it has the highest MAC address
D.Switch C,because it is the most centrally located switch
E.Switch A,because it is the most centrally located switch
F.Switch D,because it has the highest priority
相似问题和答案
第1题：
A.The Fa0/11 role confirms that SwitchA is the root bridge for VLAN 20.
B.VLAN 20 is running the Per VLAN Spanning Tree Protocol.
C.The MAC address of the root bridge is 0017.596d.1580.
D.SwitchA is not the root bridge, because not all of the interface roles are designated.
第2题：
A.This switch has more than one interface connected to the root network segment in VLAN 2.
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 2 than the elected designated switch.
第3题：
Which of the following components must be elected before the Spanning Tree Protocol can converge in a switched LAN?
A. Designated ports.
B. Duplex operating mode.
C. Fast mode ports.
D. Root bridge.
E. Root ports.
F. BDPU priority.
A,D,E 解析：Explanation:
Designated port: Either a root port or a port that has been determined as having the best (lower) cost-a designated port will be marked as a forwarding port.
Root bridge: The root bridge is the bridge with the best bridge ID. With STP, the key is for all the switches in the network to elect a root bridge that becomes the focal point in the network. All other decisions in the network-like which port is to be blocked and which port is to be put in forwarding mode-are made from the perspective of this root bridge.
Root port: Always the link directly connected to the root bridge, or the shortest path to the root bridge. If more than one link connects to the root bridge, then a port cost is determined by checking the bandwidth of each link. The lowest cost port becomes the root port.
So these three components must be elected before the spanning tree protocol can converge in a switched LAN
第4题：
Refer to Topic TestKing.com in iPAD document.Which switch is the root bridge for VLAN 1?（）
- A、TestKingD
- B、TestKing1
- C、TestKing2
- D、TestKing3
正确答案:A
第5题：
In the Cisco FabricPath domain， one switch becomes the root for the multidestination tree. Cisco FabricPath switches compare which three parameters to select the root？ （）
- A、 Root priority
- B、 System ID
- C、 Bridge ID
- D、 Switch ID
- E、 Port ID
- F、 Subswitch ID
正确答案:A,B,D
第6题：
A.It has more than one interface that is connected to the root network segment.
B.It is running RSTP while the elected root bridge is running 802.1d spanning tree.
C.It has a higher MAC address than the elected root bridge.
D.It has a higher bridge ID than the elected root bridge.
第7题：
A.Switch3
B.Switch4
C.Switch2
D.Switch1
第8题：
A.Switch1
B.Switch2
C.Switch3
D.Switch4
第9题：
Which statement is true about TCN propagation？（）
- A、The originator of the TCN immediately floods this information through the network.
- B、The TCN propagation is a two step process.
- C、A TCN is generated and sent to the root bridge.
- D、The root bridge must flood this information throughout the network.
正确答案:C
第10题：
Refer to the exhibit. The output that is shown is generated at a switch. Which three of these statements are true? （）
- A、All ports will be in a state of discarding, learning, or forwarding.
- B、Thirty VLANs have been configured on this switch.
- C、The bridge priority is lower than the default value for spanning tree.
- D、All interfaces that are shown are on shared media.
- E、All designated ports are in a forwarding state.
- F、The switch must be the root bridge for all VLANs on this switch.
正确答案:A,C,E