Refer to the exhibit. While troubleshooting a serial interface, a technician enters the command show interface serial 0/0/0 . If the interface is in DCE mode, what two problems are likely to cause the indicated problem? (Choose two.)

Refer to the exhibit. While troubleshooting a serial interface, a technician enters the command show interface serial 0/0/0 . If the interface is in DCE mode, what two problems are likely to cause the indicated problem? (Choose two.)

• The remote CSU or DSU has failed.
• The router is not sensing a CD signal.
• A timing problem has occurred on the cable.
• The line is not physically connected to the CSU/DSU.
• The router configuration contains the shutdown interface configuration command.

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