单项选择题
A.show interfaces brief
B.show interfaces status
C.show ip interface brief
D.show interfaces terse
单项选择题 In Ethernet networks, duplex mismatches will lower performance. Which error statistics can be seen if a duplex mismatch is present?（）
多项选择题 To troubleshoot interface problems, you can use both the disable command and the deactivate command. Which two statements are correct?（）
多项选择题 If a SONET/SDH interface transmit link fails between two JUNOS devices, which two alarms or defects would be seen on those devices?（）