单项选择题
Which of the following cable types is associated with an Ethernet with a RJ45 connector？（）
A.10Base2 B.10Base5 C.10BaseT D.10BaseF
单项选择题 Whichofthefollowingcabletypescancauseinterferenceonthenetworkwhendisconnectinganyonemachine？（）
单项选择题 Whichofthefollowingfilescontainsthesettingsforthesystem’sDNSdomainnameandDNSservers？（）
单项选择题 WhichofthefollowingoptionsbestjustifieswhyaDNSservershouldberuninalargenetworksystem？（）
