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多选题
In Layer 2 topologies， spanning-tree failures can cause loops in the network. These unblocked loops can cause network failures because of excessive traffic. Which two Catalyst 6500 features can be used to limit excessive traffic during spanning-tree loop conditions？ （）
A
loop guard
B
storm control
C
storm suppression
D
broadcast suppression
E
BPDU guard
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更多 “多选题In Layer 2 topologies， spanning-tree failures can cause loops in the network. These unblocked loops can cause network failures because of excessive traffic. Which two Catalyst 6500 features can be used to limit excessive traffic during spanning-tree loop conditions？ （）Aloop guardBstorm controlCstorm suppressionDbroadcast suppressionEBPDU guard” 相关考题
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Which two of these are characteristics of MPLS VPNs?()
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Which three Layer 2 access designs have all of their uplinks in an active state?()
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Which spanning-tree command would cause a PortFast-enabled interface to lose its PortFast-operational status and disable BPDU filtering if it receives BPDUs？（）A、spanning-tree guard rootB、spanning-tree portfast bpduguard defaultC、spanning-tree bpduguard enableD、spanning-tree bpdufilter enableE、spanning-tree portfast bpdufilter default
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Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention？ （）A、 Loop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannotB、 UDLD protects against STP failures caused by cabling problems that create one-way links.C、 Loop guard detects and protects against duplicate packets being received and transmitted on different portsD、 UDLD protects against unidirectional cabling problems on copper and fiber media.E、 Loop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.
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Which of these Layer 2 access designs does not support VLAN extensions？（）A、FlexLinksB、loop-free UC、looped squareD、looped triangleE、loop-free inverted U
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In Layer 2 topologies， spanning-tree failures can cause loops in the network. These unblocked loops can cause network failures because of excessive traffic. Which two Catalyst 6500 features can be used to limit excessive traffic during spanning-tree loop conditions？ （）A、loop guardB、storm controlC、storm suppressionD、broadcast suppressionE、BPDU guard
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Which two of these are characteristics of MPLS VPNs？ （）A、 Layer 3 MPLS VPNs can forward only IP packetsB、 Layer 2 MPLS VPNs can forward any network protocolC、 MPL S label paths are automatically formed based on Layer 2 framesD、 Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesE、 In Layer 2 MPLS VPNS， the service provider controls the customer Layer 3 policies
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Which of the protocols below, operates at Layer 2 of the OSI model, and is used to maintain a loop-free network?（）A、RIPB、STPC、IGRPD、CDPE、VTP
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Which three Layer 2 access designs have all of their uplinks in an active state？ （）A、 Flex LinksB、 loop free UC、 looped squareD、 looped triangleE、 loop-tree inverted U
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In Layer 2 topologies， spanning-tree failures can cause loops in the network. These unblocked loops cancause network failures because of excessive traffic. Which two Catalyst 6500 features can be used to limitexcessive traffic during spanning-tree loop conditions？（）A、loop guardB、storm controlC、storm suppressionD、broadcast suppressionE、BPDU guard
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多选题Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention？（）ALoop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannot.BUDLD protects against STP failures caused by cabling problems that create one-way links.CLoop guard detects and protects against duplicate packets being received and transmitted on different ports.DUDLD protects against unidirectional cabling problems on copper and fiber media.ELoop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.
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单选题The major cause of anchor buoy pendant wire failures is（）.A
corrosionB
rough weatherC
defective socketsD
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多选题When designing a converged network, which measures can be taken at the building access layer to help eliminate latency and ensure end-to-end quality of service can be maintained? （）Arate limit voice trafficBconfigure spanning-tree for fast link convergenceCisolate voice traffic on separate VLANsDclassify and mark traffic close to the source
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多选题Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention？ （）ALoop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannotBUDLD protects against STP failures caused by cabling problems that create one-way links.CLoop guard detects and protects against duplicate packets being received and transmitted on different portsDUDLD protects against unidirectional cabling problems on copper and fiber media.ELoop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.
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RIPB
STPC
IGRPD
CDPE
VTP
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多选题Which two of these are characteristics of MPLS VPNs?（）ALayer 3 MPLS VPNs can forward only IP packetsBLayer 2 MPLS VPNs can forward any network protocolCMPLS label paths are automatically formed based on Layer 2 framesDLayer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesEIn Layer 2 MPLS VPNS, the service provider controls the customer Layer 3 policies
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单选题Which of the following commands can be issued without interfering with the operation of loop guard？（）A
Switch（config-if）#spanning-tree guard rootB
Switch（config-if）#spanning-tree portfastC
Switch（config-if）#switchport mode trunkD
Switch（config-if）#switchport mode access
考题
多选题In Layer 2 topologies， spanning-tree failures can cause loops in the network. These unblocked loops can cause network failures because of excessive traffic. Which two Catalyst 6500 features can be used to limit excessive traffic during spanning-tree loop conditions？ （）Aloop guardBstorm controlCstorm suppressionDbroadcast suppressionEBPDU guard
考题
单选题Which statement about data center access layer design modes is correct？（）A
The access layer is the first oversubscription point in a data center design.B
When using a Layer 2 loop-free design， VLANs are extended into the aggregation layer.C
When using a Layer 2 looped design， VLANs are not extended into the aggregation layer.D
When using a Layer 3 design， stateful services requiring Layer 2 connectivity are provisionedfrom the aggregation layer.E
The data center access layer provides the physical-level connections to the server resourcesand only operates at Layer 3.
考题
多选题In Layer 2 topologies， spanning-tree failures can cause loops in the network. These unblocked loops cancause network failures because of excessive traffic. Which two Catalyst 6500 features can be used to limitexcessive traffic during spanning-tree loop conditions？（）Aloop guardBstorm controlCstorm suppressionDbroadcast suppressionEBPDU guard
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