单项选择题
A.no
B.chdev
C.frcactrl
D.ifconfig
单项选择题 WhichofthefollowingSMITpanelscreensareusedtoconfigureasystem’sbasicnetworkparametersfortheveryfirsttimeonly？（）
单项选择题 Below is the routing table for host "earth"： If host "earth" tries to ping 128.78.1.5， to which of the following interfaces is the packet being sent？（）
单项选择题 InaTCP/IPnetwork，whichofthefollowingcommandsutilizestheICMPprotocol？（）