单项选择题
A.Coaxial
B.Fiber optic
C.Cat 3 UTP
D.Cat 5 UTP
单项选择题 Whichofthefollowingcommandsisusedtoobservethecurrentstateoftheroutingtable？（）
单项选择题 Anetworkadministratorhasa10base2network.Acardisprovidedthathasboth10base2and10base5ports.WhichofthefollowingtypesofcablesshouldbeselectedinSMITduringconfigurationoftheadapter？（）
单项选择题 WhichofthefollowingfilesshouldbeusedtoaltertheorderofwhichDNSserversgetqueriedfirst？（）