Withoutproper safeguards,everypartofanetworkisvulnerabletoasecuritybreachor unauthorizedactivityfrom(本题),competitors,orevenemployees.Manyof theorganizationsthatmanagetheirown (72)networksecurityanduse theInternetformorethanjustsending/receivinge-mailsexperiencea network(73)—andmorethanhalfofthesecompaniesdo notevenknowtheywereattacked.Smaller (74)areoftencomplacent, havinggainedafalsesenseofsecurity.Theyusuallyreacttothelastvirus orthemostrecentdefacingoftheirwebsite.Buttheyare trappedina situationwheretheydonothavethenecessarytimeand(75) tospendonsecurity.
A.intruders B.terminals C.hosts D.users正确答案A
