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20.A(n)______________isasystemcomposedofhardware,software,orboththatisdesignedtodetectintrusionandpreventunauthorizedaccesstoorfromaprivatenetwork.

A. encryption
B. firewall
C. alarm
D. logicbomb

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21.BigDataischaracterizedbyallofthefollowingexcept______________.

A. verifiability
B. velocity
C. variety
D. volume

22.AstudentbuyingabookatAmazon.comillustrateswhichofthefollowingcorebusinessprocesses?

A. time-to-purchase
B. order-to-cash
C. plan-to-produce
D. account-to-report
E. hire-to-retire

23.Taggingisadding______________tocontentsuchasmaps,pictures,orwebpages.

A. metadata
B. comments
C. blogs
D. knowledge

24.RonalddownloadsamoviefromtheInternetontohiscompany'scomputer.Duringthisprocess,hissystemgetsinfectedwithavirus.Thevirusspreadsrapidlyinthecompany'snetworkcausingtheservertocrash.Thistypeofvirusismostlikelytobe________.

A. adware
B. phishingmail
C. spam
D. aworm
E. aTrojanhorse