单项选择题

A.Configuration changes made on the port-channel interf……

Which statement is true regarding the Port Aggregation Protocol？（）

A.Configuration changes made on the port-channel interface apply to all physical ports assigned to the portchannel interface.
B.Configuration changes made on a physical port that is a member of a port-channel interface apply to the port-channel interface.
C.Configuration changes are not permitted with Port Aggregation Protocol； instead， the standardized Link Aggregation Control Protocol should be used if configuration changes are required.
D.The physical port must first be disassociated from the port-channel interface before any configuration changes can be made.

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单项选择题WhichcommandalonewilldisabletrunkingonaLayer2switchport？（）

A.no switchport trunk native vlan vlan-id
B.switchport nonegotiate
C.no switchport mode dynamic desirable
D.switchport mode access

单项选择题WhichconfigurationoptionwillcausethelinkbetweentwoCisco3600SeriesMultiservicePlatformstobecomeafunctionaltrunk？（）

A.switchport dynamic auto switchport dynamic auto
B.switchport access vlan 10 switchport mode dynamic desireable
C.switchport mode trunk switchport nonegotiate
D.Leave both ports with the default trunk settings

单项选择题Whatistheeffectofapplyingtheswitchporttrunkencapsulationdot1qcommandtoaportonaCiscoCatalystswitch？（）

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.
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单项选择题WhichstatementcorrectlydescribestheCiscoimplementationofRSTP？（）

A.PortFast， UplinkFast， and BackboneFast specific configurations are ignored in Rapid PVST mode.
B.RSTP is enabled globally and uses existing STP configuration.
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多项选择题WhichtwostatementscorrectlydescribeUDLD？（）

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.