Thereare3stepstoconfirmwhetherarangeofIPaddresscanbesummarized.Whenofthefollowingisusedineachofthese3steps?()
A. Thefirstnumberinthecontiguousblockofaddresses
B. Thelastnumberinthecontiguousblockofaddresses
C. Thesizeofthecontiguousblockofaddresses
D. Thesubnetmaskoftheoriginalnetworkaddress