单选题A system administrator is monitoring a system that has recently shown a decrease in performance. The administrator suspects there is an overload of traffic on a single Ethernet adapter. Which of the following commands is best to identify a possible ove

A system administrator is monitoring a system that has recently shown a decrease in performance. The administrator suspects there is an overload of traffic on a single Ethernet adapter. Which of the following commands is best to identify a possible overload of the Ethernet adapter？（）