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多选题
In which Spanning-Tree states does a switch port learn MAC addresses?（）
A
Blocking
B
Listening
C
Forwarding
D
Learning
E
Relaying
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What does a Layer 2 switch use to decide where to forward a received frame?()
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What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table()。
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Which set of commands is recommended to prevent the use of a hub in the access layer?（）A、switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security maximum 1B、switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security mac-address 1C、switch(config-if)#switchport mode access switch(config-if)#switchport port-security maximum 1D、switch(config-if)#switchport mode access switch(config-if)#switchport port-security mac-address 1
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What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology？（）A、lowest port MAC addressB、port priority number and MAC addressC、VTP revision numberD、highest port priority numberE、path cost
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What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-treetopology?（）A、lowest port MAC addressB、port priority number and MAC address.C、VTP revision numberD、highest port priority number.E、pathcost
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A port in a redundant topology is currently in the blocking state and is not receiving BPDUs. To ensure that this port does not erroneously transition to the forwarding state， which command should be configured to satisfy the requirement？（）A、Switch（config）#spanning-tree loopguard defaultB、Switch（config-if）#spanning-tree bdpufilterC、Switch（config）#udld aggressiveD、Switch（config-if）#spanning-tree bpduguard
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What value is primarily used to determine which port becomes the root port on each non root switch in a spanning-tree topology?（）A、path costB、lowest port MAC addressC、VTP revision numberD、highest port priority numberE、port priority number and MAC address
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A network administrator needs to configure port security on a switch.which two statements are true？（）A、The network administrator can apply port security to dynamic access portsB、The network administrator can configure static secure or sticky secure mac addresses in the voice vlan.C、The sticky learning feature allows the addition of dynamically learned addresses to the runningconfiguration.D、The network administrator can apply port security to EtherChannels.E、When dynamic mac address learning is enabled on an interface，the switch can learn new addresses，up to the maximum defined.
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What value is primarily used to determine which port becomes the root port on each nonroot switch in aspanning-tree topology？（）A、lowest port MAC addressB、port priority number and MAC address.C、VTP revision numberD、highest port priority number.E、path cost
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What does a Layer 2 switch use to decide where to forward a received frame?（）A、source MAC addressB、source IP addressC、source switch portD、destination IP addressE、destination port addressF、destination MAC address
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What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table?（）A、The switch will not forward unicast frames.B、The switch will forward the frame to a specific port.C、The switch will return a copy of the frame out the source port.D、The switch will remove the destination MAC from the switch table.E、The switch will forward the frame to all ports except the port on which it was received.
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A network administrator needs to configure port security on a switch.which two statements are true?（）A、The network administrator can apply port security to dynamic access portsB、The network administrator can configure static secure or sticky secure mac addresses in the voice vlan.C、The sticky learning feature allows the addition of dynamically learned addresses to the running configuration.D、The network administrator can apply port security to EtherChannels.E、When dynamic mac address learning is enabled on an interface,the switch can learn new addresses,up to the maximum defined.
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What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?（）A、lowest port MAC addressB、port priority number and MAC address.C、VTP revision numberD、highest port priority number.E、path cost
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Three switches are connected to one anther via trunk ports.Assuming the default switch configuration,which switch is elected as the root bridge for the spanning-tree instance of vlan 1?（）A、the switch with the lowest MAC addressB、the switch with the higest MAC addressC、the switch witch the higest IP addressD、the switch with the lowest IP address
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In which Spanning-Tree states does a switch port learn MAC addresses?（）A、BlockingB、ListeningC、ForwardingD、LearningE、Relaying
考题
单选题Three switches are connected to one anther via trunk ports.Assuming the default switch configuration,which switch is elected as the root bridge for the spanning-tree instance of vlan 1?（）A
the switch with the lowest MAC addressB
the switch with the higest MAC addressC
the switch witch the higest IP addressD
the switch with the lowest IP address
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单选题A port in a redundant topology is currently in the blocking state and is not receiving BPDUs. To ensure that this port does not erroneously transition to the forwarding state， which command should be configured to satisfy the requirement？（）A
Switch（config）#spanning-tree loopguard defaultB
Switch（config-if）#spanning-tree bdpufilterC
Switch（config）#udld aggressiveD
Switch（config-if）#spanning-tree bpduguard
考题
单选题What does a Layer 2 switch use to decide where to forward a received frame?（）A
source MAC addressB
source IP addressC
source switch portD
destination IP addressE
destination port addressF
destination MAC address
考题
单选题What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table（）。A
The switch will not forward unicast frames.B
The switch will forward the frame to a specific port.C
The switch will return a copy of the frame out the source port.D
The switch will remove the destination MAC from the switch table.E
The switch will forward the frame to all ports except the port on which it was received.
考题
单选题What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?（）A
lowest port MAC addressB
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VTP revision numberD
highest port priority number.E
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单选题What value is primarily used to determine which port becomes the root port on each non root switch in a spanning-tree topology?（）A
path costB
lowest port MAC addressC
VTP revision numberD
highest port priority numberE
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lowest port MAC addressB
port priority number and MAC address.C
VTP revision numberD
highest port priority number.E
path cost
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单选题What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-treetopology?（）A
lowest port MAC addressB
port priority number and MAC address.C
VTP revision numberD
highest port priority number.E
pathcost
考题
单选题Which type of MAC address is dynamically learned by a switch port and then added to the switch’s runningconfiguration？（）A
Static secure MAC addressB
Dynamic secure MAC addressC
Pervasive secure MAC addressD
Sticky secure MAC address
考题
单选题What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology？（）A
lowest port MAC addressB
port priority number and MAC addressC
VTP revision numberD
highest port priority numberE
path cost
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