单项选择题 An administrator is ordering a new Power 550. They will mirror rootvg and are concerned about single points of failure.  Which of the following features should be ordered（）

单项选择题 A 1500 page print job was sent to the "pel" queue. The job was running for several minutes before it  was determined that the job was not needed.  Which of the following options will delete the job（）  Ipstat   Queue Dev Status Job Files User PP %   Hks Cp Rnk   pd pel RUNNING 201 STDIN.27648 root 750 10   1000 1 1

单项选择题 MultipleusersaretryingtotelnettotheAIXserver.Theyareabletopingtheserversuccessfully，butaregettingthefollowingerrormessage：telnet：connect：AremotehostrefusedanattemptedconnectoperationWhichofthefollowingoptionscouldbethecauseofthisproblem（）