Youadministeranetworkthatusestworouters，R1andR2，configuredasanHSRPgrouptoprovideredundancyforthegateway.RouterR1istheactiverouterandhasbeenconfiguredasfollows：
R1#configureterminal
R1（config）#interfacefa0/0
R1（config-if）#ipaddress10.10.0.5255.255.255.0
R1（config-if）#standby1priority150
R1（config-if）#standbypreemptdelayminimum50
R1（config-if）#standby1trackinterfacefa0/215
R1（config-if）#standby1ip10.10.0.20
Whichofthefollowingdescribestheeffectthestandbypreemptdelayminimum50commandwillhaveonrouterR1？（）

A.TACACS+istheonlysupportedauthenticationservertype.
B.Ifahostinitiatestheauthenticationprocessanddoesnotreceivearesponse，itassumesitisnotauthorized.
C.RADIUSistheonlysupportedauthenticationservertype.
D.Beforetransmittingdata，an802.1xhostmustdeterminetheauthorizationstateoftheswitch.
E.Hostsarerequiredtohavea802.1xauthenticationclientorutilizePPPoE.
F.Noneoftheotheralternativesapply.

A.iprouting
B.switchportmodetrunk
C.noswitchport
D.switchporttrunknativevlan1
E.Noneoftheotheralternativesapply

A.0002.0002switchportport-securityviolationshutdownGiventheconfigurationoutputshownabove，whathappenswhenahostwiththeMACaddressof0003.0003.0003isdirectlyconnectedtotheswitchport？（）
A.Thehostwillbeallowedtoconnect.
B.Theportwillshutdown.
C.Thehostcanonlyconnectthroughahub/switchwhere0002.0002.0002isalreadyconnected.
D.Thehostwillberefusedaccess.
E.Noneoftheotheralternativesapply