单项选择题
A.Mirrors data
B.Redundancy
C.Speed
D.Automatic hot spare
多项选择题 Whenplanningforredundantpowersourcesinaserverdeployment，whichofthefollowingshould bepurchased？（）
单项选择题 Atechnicianmanagesaserverthatcontainssensitivedata.Theservercurrentlyhastwohard drives，onehostingtheoperatingsystemandothergenericfilesandthesecondhostingsensitive data.Thetechnicianneedstoimplementatechnologythatwouldguardagainstdatalossforonly thesensitivedata，whileaddingonlyoneadditionalharddrive.Whichofthefollowingshouldthe technicianimplementtoavoidreformattinganydrives？（）
单项选择题 Atechnicianworksforacompanythathasrecentlybeenaffectedbyavirus.Thevirusenteredthe networkbyusingport6000.Port6000isusedbyanapplicationlocatedonaserver.The technicianhasbeenaskedtoblockthisportonallserversandcomputersexceptfortheone serverwhichusesthisport.Whichofthefollowingshouldthetechniciando？（）