單項選擇題What does the command udld reset accomplish?()

A.allows an UDLD port to automatically reset when it has been shutdown
B.resets all UDLD enabled ports that have been shutdown
C.removes all UDLD configurations from interfaces that were globally enabled
D.removes all UDLD configurations from interfaces that were enabled per-port


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4.單項選擇題

Switch 1 was configured as shown below: 

Based on the output shown above, 
which statement is true?()
 

A.IP traffic matching access list is forwarded through VLANs 5-10.
B.All VLAN traffic in VLANs 5-10 that match access list will be forwarded, and all else will be dropped.
C.IP traffic matching VLAN list 5-10 will be forwarded, and all other traffic will be dropped.
D.All VLAN traffic matching VLAN list 5-10 will be forwarded, and all traffic matching access list is dropped.
E.None of the other alternatives apply

5.單項選擇題

The following was configured on a switch: 
Switch(config) # spanning-tree portfast bpdufilter default 
What is the effect of this configuration command?()

A.If BPDUs are received by a port configured for PortFast, they are ignored and none are sent.
B.The command will enable BPDU filtering on all ports regardless of whether they are configured for BPDU filtering at the interface level.
C.If BPDUs are received by a port configured for Portfast, the port will transition to forwarding state.
D.If BPDUs are received by a port configured for PortFast, then PortFast is disabled and the BPDUs are processed normally.
E.None of the other alternatives apply.

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