Withoutproper safeguards,everypartofanetworkisvulnerabletoasecuritybreachor unauthorizedactivityfrom(),competitors,orevenemployees.Manyof theorganizationsthatmanagetheirown ()networksecurityanduse theInternetformorethanjustsending/receivinge-mailsexperiencea network(本题)—andmorethanhalfofthesecompaniesdo notevenknowtheywereattacked.Smaller ()areoftencomplacent, havinggainedafalsesenseofsecurity.Theyusuallyreacttothelastvirus orthemostrecentdefacingoftheirwebsite.Buttheyare trappedina situationwheretheydonothavethenecessarytimeand() tospendonsecurity.
A.attack B.collapse C.breakdown D.virus正确答案A
