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
Which command enhances the 802.1D convergence time on ports that are connected to hosts?（）
- A、spanning-tree backbonefast
- B、spanning-tree uplinkfast
- C、spanning-tree portfast
- D、spanning-tree cost512
相关考题：
AnewCompanyswitchwasjustconfiguredusingtheswitchporttrunknativevlan7command.Whatdoesthisinterfacecommandaccomplish?() A.CausestheinterfacetoapplyISLframingfortrafficonVLAN7B.ConfiguresthetrunkinginterfacetoforwardtrafficfromVLAN7C.ConfigurestheinterfacetobeatrunkingportandcausestrafficonVLAN7tobe802.1qtaggedD.ConfiguresthetrunkinginterfacetosendtrafficfromVLAN7untaggedE.Noneoftheotheralternativesapply
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
Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch over FastEthernet?() A. 802.3adB. 802.1wC. 802.1QD. 802.1d
What is the effect of applying the switchport trunk encapsulation dot1q command to a port on a Cisco Catalyst switch？（）A、By default， native VLAN packets going out this port will be tagged.B、Without an encapsulation command， 802.1Q will be the default encapsulation if DTP fails to negotiate a trunking protocol.C、The interface will support the reception of tagged and untagged traffic.D、If the device connected to this port is not 802.1Q-enabled， it will not be able to handle 802.1Q packets.
Which two of the following are designated fields for MAC tunneling protocol（802.1 ah）？（）A、Service EthertypeB、ISLC、PseudoLAN TAGD、802.1q VLAN TAGE、Control WordF、Tunnel Label
Which encapsulation types are configurable on a Cisco switch for a trunk?（）A、VTPB、ISLC、CDPD、802.1QE、802.1pF、LLCG、IETF
Which two protocols are used by bridges and/or switches to prevent loops in a layer 2 network?（）A、802.1dB、VTPC、802.1qD、STPE、SAP
Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch over FastEthernet?（）A、802.3adB、802.1wC、802.1QD、802.1d
The Company security administrator is concerned with VLAN hopping based attacks. Which two statements about these attacks are true？ （）A、 Attacks are prevented by utilizing the port-security feature.B、 An end station attempts to gain access to all VLANs by transmitting Ethernet frames in the 802.1q encapsulation.C、 Configuring an interface with the switchport mode dynamic command will prevent VLAN hopping.D、 An end station attempts to redirect VLAN traffic by transmitting Ethernet frames in the 802.1q encapsulation.E、 Configuring an interface with the "switchport mode access" command will prevent VLAN hopping.
Which of the following specification will allow you to： associate VLAN groups to STP instances so you can provide multiple forwarding paths for data traffic and enable load balancing？ （）A、 IEEE 802.1d （STP）B、 IEEE 802.1s （MST）C、 IEEE 802.1Q （CST）D、 IEEE 802.1w （RSTP）
Prior to 802.1w，Cisco implemented a number of proprietary enhancements to 802.1D to improve convergence in a Layer 2 network. Which statement is correct？（）A、Only UplinkFast and BackboneFast are specified in 802.1w；PortFast must be manually configured.B、Only PortFast is specified in 802.1w；UplinkFast and BackboneFast must be manually configured.C、None of the proprietary Cisco enhancements are specified in 802.1w.D、PortFast，UplinkFast，and BackboneFast are specified in 802.1w.
kristin wants to build an action which exits the video form. the action will be avaiable only when the user is reading the document ,which one of the following accomplish this ? （）A、@ command([back]) B、@ command([fileexit]) C、@ command([gotoview]) D、@ command([fileclosewindow])
单选题Which of these correctly identifies a difference between the way BPDUs are handled by 802.1w and 802.1D？ （）A 802.1D bridges do not relay BPDUs.B 802.1w bridges do not relay BPDUs.C 802.1D bridges only relay BPDUs received from the root.D 802.1w bridges only relay BPDUs received from the root.
多选题Which of the following wireless standards can be used to avoid the 2.4GHz range?（） (Select TWO).A802.11gB802.1XC802.11bD802.1nE802.11a
单选题Which of these correctly identifies a difference between the way BPDUs are handled by 802.1w and 802.1D？（）A802.1D bridges do not relay BPDUs.B802.1w bridges do not relay BPDUs.C802.1D bridges only relay BPDUs received from the root.D802.1w bridges only relay BPDUs received from the root.
多选题Which two of the following are designated fields for MAC tunneling protocol（802.1 ah）？（）AService EthertypeBISLCPseudoLAN TAGD802.1q VLAN TAGEControl WordFTunnel Label
单选题Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch overFastEthernet？（）A802.3adB802.1wC802.1QD802.1d
多选题Which two statements are true about 802.1s？（）A802.1s supports a reduced number of spanning-tree instances.B802.1s has better convergence times than 802.1w.C802.1s does not support load balancing over the same physical topology.DThe CPU utilization for 802.1s is lower than the CPU utilization for 802.1w.
单选题kristin wants to build an action which exits the video form. the action will be avaiable only when the user is reading the document ,which one of the following accomplish this ? （）A@ command([back]) B@ command([fileexit]) C@ command([gotoview]) D@ command([fileclosewindow])
多选题Which two protocols are used by bridges and/or switches to prevent loops in a layer 2 network?（）A802.1dBVTPC802.1qDSTPESAP
多选题Which encapsulation types are configurable on a Cisco switch for a trunk?（）AVTPBISLCCDPD802.1QE802.1pFLLCGIETF
单选题Which spanning Tree Protocol has been implemented on switch 2？ （）ASTP/IEEE 802.1DBMSTP/IEEE 802.1sCPVST+DPVRSTENone of the other alternatives apply
单选题What is the effect of applying the switchport trunk encapsulation dot1q command to a port on a Cisco Catalyst switch？（）ABy default， native VLAN packets going out this port will be tagged.BWithout an encapsulation command， 802.1Q will be the default encapsulation if DTP fails to negotiate a trunking protocol.CThe interface will support the reception of tagged and untagged traffic.DIf the device connected to this port is not 802.1Q-enabled， it will not be able to handle 802.1Q packets.