Which port state is introduced by Rapid-PVST?（）
Which of the following characteristics describe the Root Guard feature？（Choose all that apply.）（）A、The port must be put into forwarding state manually after root-inconsistent state has beencorrectedB、A Root Guard port receiving superior BPDU goes into a root-inconsistent stateC、A Root Guard port receiving inferior BPDU goes into a root-inconsistent stateD、While the port is in a root-inconsistent state no user data is sent across that portE、The port returns to a forwarding state if inferior BPDUs stopF、It should be applied to all switch ports
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Which two statements are true about BPDU port-guard and BPDU filtering？（）A、BPDU port-guard can be enabled globally， whereas BPDU filtering must be enabled on a per-interface basis.B、When globally enabled， BPDU port-guard and BPDU filtering apply only to PortFast enabled ports.C、When globally enabled， BPDU port-guard and BPDU filtering apply only to trunking-enabled ports.D、When a BPDU is received on a BPDU port-guard enabled port， the interface goes into the err-disabled state.E、When a BPDU is received on a BPDU filtering enabled port， the interface goes into the err-disabled state.F、When a BPDU is received on a BPDU filtering enabled port， the interface goes into the STP blocking state.
Which of the following statements are true regarding Layer 3 switches？（Choose all that apply.）（）A、A routed port does not run STP or DTPB、A routed port is considered to be in a down state if it is not operational at both Layer 1 andLayer 2C、An SVI is considered to be in a down state if it is not operational at both Layer 1 and Layer 2D、An SVI is considered to be in a down state only when none of the ports in the correspondingVLAN are activeE、An SVI port does not run 5TP or DTPF、To create a trunk， an SVI can be logically divided into subinterfaces
Which port state is introduced by Rapid-PVST?（）A、learningB、listeningC、discardingD、forwarding
Which statement is correct about RSTP port roles？（）A、The designated port is the switch port on every nonroot bridge that is the chosen path to theroot bridge. There can be only one designated port on every switch. The designated portassumes the forwarding state in a stable active topology. All switches connected to a given segment listen to all BPDUs and determine the switch that will be the root switch for a particular segment.B、The disabled port is an additional switch port on the designated switch with a redundant link to the segment for which the switch is designated. A disabled port has a higher port ID than the disabled port on the designated switch. The disabled port assumes the discarding state in astable active topology.C、The backup port is a switch port that offers an alternate path toward the root bridge. The backup port assumes a discarding state in a stable， active topology. The backup port will be present on nondesignated switches and will make a transition to a designated port if the current designated path fails.D、The root port is the switch port on every nonroot bridge that is the chosen path to the root bridge. There can be only one root port on every switch. The root port assumes the forwarding state in a stable active topology.
Which port state is interface Fa0/2 of switch 2 in for VLANs 1 and 160？ （）A、ListeningB、LearningC、DisabledD、BlockingE、ForwardingF、DiscardingG、None of the other alternatives apply
多选题Which of the following statements are true regarding Layer 3 switches？（Choose all that apply.）（）AA routed port does not run STP or DTPBA routed port is considered to be in a down state if it is not operational at both Layer 1 andLayer 2CAn SVI is considered to be in a down state if it is not operational at both Layer 1 and Layer 2DAn SVI is considered to be in a down state only when none of the ports in the correspondingVLAN are activeEAn SVI port does not run 5TP or DTPFTo create a trunk， an SVI can be logically divided into subinterfaces
