Which command would you type to see a concise display of which interfaces are up and which are down?（）

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?（）

A.collisions on the full-duplex side; runts on the half-duplex side
B.collisions on the full-duplex side; collisions on the half-duplex side
C.collisions on the half-duplex side; framing errors on the full-duplex side
D.collisions on the half-duplex side; giants on the full-duplex side

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?（）

A.If the interface is disabled, the logical unit will administratively shutdown.
B.If the interface is deactivated, the physical interface will administratively shutdown.
C.If the interface is deactivated, the interface configuration is ignored during commit.
D.If the interface is disabled, the logical unit configuration is ignored during commit.

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?（）

A.LOS
B.REI
C.BIP-B3
D.RDI

单项选择题Which type of traffic will cause Policed Discards errors on an interface on a JUNOS device?（）

A.Traffic that does not match any route in the forwarding table.
B.Traffic that exceeds the bandwidth of the interface.
C.Traffic of unsupported protocols on that interface.
D.Traffic arriving on unknown virtual-circuits on that interface.

单项选择题The monitor traffic command closely resembles which UNIX-based utility?（）

A.ps -x
B.passwd
C.ls -a-l
D.tcpdump