单项选择题
Which of the following adapters should be connected to coaxial cabling without the use of media converters？（）
A.Adapter with AUI connector B.Adapter with BNC connector C.Adapter with RJ-45 connector D.Adapter with DB-25 connector
单项选择题 Whichofthefollowingclassnetworksrepresentsapossibilityofbeingfurthersubnettedinto2subnetsof128hostspersubnet？（）
单项选择题 WhichofthefollowingClassAnetworksisreservedfor"privatenetworks"useonly？（）
单项选择题 WhichofthefollowingoptionsisavalidhostIPaddress？（）
