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» Cisco » Examen Cisco CCNA V3.1 » Module 2 » Chapitre 9 » Question 13/23

13.Which of the following lines from the show interfaces output would indicate a Layer 2 problem?

Serial1 is up, line protocol is up.
Serial1 is up, line protocol is down.
Serial1 is down, line protocol is down.
Serial1 is administratively down, line protocol is down.