Two routers are connected via their serial ports in a lab environment. The routers are configured with valid IP addresses, but they cannot ping each other. The show interface serial0/0 command shows that the serial0/0 interface is up but the line protocol is down. What could be the cause of this problem?
- The no shutdown command has not been applied to the interfaces.
- The clock rate command has not been entered on the DCE interface.
- The interface timers are not cleared.
- The FastEthernet interface is emulating a serial interface by assigning it a timing signal.
Exam with this question: Network Fundamentals - CCNA Exploration 1: ENetwork Final Exam
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