What is a critical piece of information that you should have when creating a VLAN-based implementation plan？（）

单项选择题WhenyoucreateanetworkimplementationVLANsolution，whatisoneprocedurethatyoushouldincludeinyourplan？（）

A.Perform an incremental implementation of components.
B.Following the PPDIOO model， implement the entire solution and then test end-to-end to make sure that it is performing as designed.
C.Implement trunking of all VLANs to ensure that traffic is crossing the network as needed before performing any pruning of VLANs.
D.Test the solution on a segmented portion of a lab network prior to rolling out across the entire network.

单项选择题You are planning a new VLAN-based network solution.  What is one item you should consider when creating your implementation plan as it concerns VLANs？（）

A.generic router and switch configuration parameters
B.end-to-end test plan after all components have been installed and  configured
C.administrator assignments
D.rollback plan

单项选择题WhatnetworkinformationdoyouneedwhenyouplantoimplementaVLAN-basedsolution？（）

A.default VLAN information for all unused switch ports
B.802.1x configuration parameters 
C.number of IP subnets needed
D.IP routing protocol information

单项选择题During testing of network redundancy in a fully meshed enterprise campus， a problem has been reported. Both distribution multilayer switches are fully configured for redundancy； clients operate normally when the primary multilayer distribution switch is operating. All clients drop connections outside of their respective access layer group when the primary distribution switch is shut down and the secondary distribution switch is still operational. Additional information indicates that the secondary  distribution switch is able to ping major corporate and Internet locations.  Which item would be the best point of troubleshooting for this connectivity issue？ （）

A.client network configuration
B.VLAN mapping
C.inter-switch trunk configuration
D.UDLD configuration
E.first-hop redundancy protocol

单项选择题WhichCiscoIOScommandgloballyenablesport-basedauthenticationonaswitch？（）

A.aaa port-auth enable
B.radius port-control enable
C.dot1x system-auth-control
D.switchport aaa-control enable