Which of the following are byproducts of a structured maintenance plan？（Choose all that apply.）（）

多项选择题WhichofthefollowingstatementsconcerningIGMParecorrect？（Chooseallthatapply.）（）

A.With IGMPvl， queries are sent to a specific group
B.Hosts issuing IGMPvl requests will be correctly interpreted by IGMPv2 hosts due to backwardcompatibility
C.An IGMPv2 router will ignore IGMPv2 leave messages when IGMFVl hosts are present
D.With IGMFV2， a leave message is supported
E.An IGMPv2 host will send an IGMFVl report on an IGMFVl router
F.An IGMPv2 router can only allow IGMPv2 hosts to execute a join request

多项选择题Whichofthefollowingpiecesofinformationwillthecommandshowinterfaceprovide？（Chooseallthatapply.）（）

A.Layer 1 status
B.Output queue drops
C.Interface CPU utilization
D.Cable type connected to interface
E.Layer 2 status
F.Input queue drops

单项选择题Whichofthefollowingcommandswilldisplayarouter’scryptomapIPsecsecurityassociationsettings？（）

A.show crypto map ipsec sa
B.show crypto map
C.show crypto engine connections active
D.show ipsec crypto map
E.show crypto map sa
F.show ipsec crypto map sa

单项选择题Whichofthefollowingisnotacharacteristicoffastswitching？（）

A.Fast switching reducesa routers CPU utilization， compared to process switching
B.All packets of a flow， except for the first packet， use the information in the fast cache
C.It can be enabled with the interface command ip route-cache
D.Fast switching uses a fast cache maintained in a router’s control plane
E.The fast cache contains information about how traffic from different data flows should beforwarded
F.Even though the fast switching is enabled， the first packet of a flow is still process switched

单项选择题Whichofthefollowingcommandswillrestoreapreviouslyarchivedconfigurationbyreplacingtherunningconfigurationwiththearchivedconfiguration？（）

A.configure archive running-config
B.configure replace
C.copy archive running config
D.copy startup-config running-config
E.copy tftp running-config
F.configure tftp running-config