Which mechanism does External BGP use to prevent the formation of routing loops？（）
AS path
B. Split horizon
C. Poison reverse
D. Unicast RPF check
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Whichcommandwouldyouusetoviewinterfaceusagedetailsinrealtime?（）
A. showinterfacesterse
B. showinterfacesextensive
C. monitorinterfacetraffic
D. monitortrafficinterface
Whichofthefollowingaremethodstoautomaticallyupdatetheantivirusapplication?（）(SelectTWO).
A. Establishrulesintheemailschedulingprogramtoperformupdates.
B. SelectUpdateNowfromtheprogramoptions.
C. UsetheAutomaticUpdatefeaturebuiltintotheapplication.
D. Usescripts.
E. UseWindowsUpdate.
Whathappenswhenyouissuetheping172.19.102.2count5command?（）
A. ICMPechorequestsaresentto172.19.102.2infive-millisecondintervals.
B. ICMPechorequestsaresentto172.19.102.2untilfivepacketsaredropped.
C. ICMPechorequestsaresentto172.19.102.2fivetimes.
D. ICMPechorequestsaresentcontinuouslyto172.19.102.2forfiveseconds.
WhichthreeTLVtypesarevalidinanIS-ISHelloPDU?（）
A. TLV10Authentication
B. TLV1AreaAddresses
C. TLV211GracefulRestart
D. TLV137DynamicHostnameResolution
E. TLV14ABRs
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