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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？ （）
A
Loop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannot
B
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 ports
D
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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更多 “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.” 相关考题
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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.
考题
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？（）A、Loop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannot.B、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 ports.D、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.
考题
What is the result of entering the command spanning-tree loopguard default？（）A、The command enables both loop guard and root guard.B、The command changes the status of loop guard from the default of disabled to enabled.C、The command activates loop guard on point-to-multipoint links in the switched network.D、The command will disable EtherChannel guard.
考题
Which statement is true about loop guard？（）A、Loop guard only operates on interfaces that are considered point-to-point by the spanning tree.B、Loop guard only operates on root ports.C、Loop guard only operates on designated ports.D、Loop guard only operates on edge ports.
考题
On switch R1 you issue the "udld enable" global command. What does this command accomplish？ （）A、 Enables all fiber-optic LAN ports for Unidirectional LINK Detection （UDLD）B、 Enables all copper media LAN ports Unidirectional Link Detection （UDLD）C、 Overrides the default UDLS setting for all portsD、 Globally enables all ports on the device for Unidirectional Link Detection （UDLS）E、 None of the other alternatives apply
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Which two statements correctly describe UDLD？ （）A、Unidirectional link detection is achieved through monitoring STP BPDUs.B、It is recommended that it be enabled globally rather than on an individual port.C、When an error is detected， normal mode will disable a port.D、It is recommended that it be enabled in normal mode.E、It is recommended that it be used with the loop guard feature.
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What does UDLD stand for？（）A、UniDirectional Loop DetectionB、Unspecified Distribution Label DetectionC、Unified Distribution Label DirectionD、UniDirectional Link Detection
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Which mechanism can you use to achieve sub-second failover for link failure detection when a switched Ethernet media is used and loss of signal is not supported by the link provider？（）A、OSPF standard hellosB、Cisco Discovery Protocol link detectionC、Bidirectional Forwarding DetectionD、Fast Link PulseE、autonegotiation
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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.
考题
单选题On switch R1 you issue the "udld enable" global command. What does this command accomplish？ （）A
Enables all fiber-optic LAN ports for Unidirectional LINK Detection （UDLD）B
Enables all copper media LAN ports Unidirectional Link Detection （UDLD）C
Overrides the default UDLS setting for all portsD
Globally enables all ports on the device for Unidirectional Link Detection （UDLS）E
None of the other alternatives apply
考题
单选题What is the result of entering the command spanning-tree loopguard default？（）A
The command enables both loop guard and root guard.B
The command changes the status of loop guard from the default of disabled to enabled.C
The command activates loop guard on point-to-multipoint links in the switched network.D
The command will disable EtherChannel guard.
考题
单选题Which statement is true about loop guard？（）A
Loop guard only operates on interfaces that are considered point-to-point by the spanning tree.B
Loop guard only operates on root ports.C
Loop guard only operates on designated ports.D
Loop guard only operates on edge ports.
考题
单选题If a port configured with STP loop guard stops receiving BPDUs，the port will be put into which state？（）A
learning stateB
listening stateC
forwarding stateD
root-inconsistent state
考题
多选题Which two statements correctly describe UDLD？ （）AUnidirectional link detection is achieved through monitoring STP BPDUs.BIt is recommended that it be enabled globally rather than on an individual port.CWhen an error is detected， normal mode will disable a port.DIt is recommended that it be enabled in normal mode.EIt is recommended that it be used with the loop guard feature.
考题
单选题What does UDLD stand for？（）A
UniDirectional Loop DetectionB
Unspecified Distribution Label DetectionC
Unified Distribution Label DirectionD
UniDirectional Link Detection
考题
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
单选题Which mechanism can you use to achieve sub-second failover for link failure detection when a switched Ethernet media is used and loss of signal is not supported by the link provider？（）A
OSPF standard hellosB
Cisco Discovery Protocol link detectionC
Bidirectional Forwarding DetectionD
Fast Link PulseE
autonegotiation
考题
单选题A towing vessel’s fire detection system may be certified to comply with the Coast Guard’s towing vessel fire protection regulations by（）.A
a Coast Guard inspectorB
a registered professional engineerC
the owner or Master of the vesselD
a licensed electrician
考题
单选题What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）A
Call Management Link AgentB
Traffic policingC
Call Admission ControlD
QoS Link Congestion ManagementE
Oversubscription Link Detection
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