Whichtwocommandsallowyoutoreturntoapreviousversionofsoftwareonthedevice?（）
A. requestsystemsoftwareadd
B. requestsystemsoftwaredowngrade
C. requestsystemsoftwarereplace
D. requestsystemsoftwarerollback
Thepolicyactionofcolorisusedforcongestioncontrolunderwhichcircumstance?（）
A. congestioninanupstreamrouter
B. congestioninadownstreamrouter
C. contentionforqueuespaceonanegressinterface
D. contentionforqueuespaceonaningressinterface
WhichCLIcommanddoyouusetodeterminewhichfilesarecleanupcandidates?（）
A. requestsystemstoragecleanupcandidates
B. requestsystemservicesstoragecandidates
C. requestsystemservicescandidatecleanup
D. requestsystemstoragecleanupdry-run
Whichthreestepsarepartoftherootpasswordrecoveryprocess?（）
A. Rebootthedevice.
B. Runtherecoveryscript.
C. Resettherootpassword.
D. Resettheuserpasswords.
E. Loadfactory-defaultconfiguration.
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