A.PermitRootLoginno B.DenyRootyes C.RootEnableno D.AllowSuperLoginno
A.selectversion() B.select*from$version C.select*fromv$version D.select*fromdb_version
A.ping210.102.58.74 B.tracert210.102.58.74 C.netstat210.102.58.74 D.arp210.102.58.74