Refer to the exhibit. A network administrator has a connectivity problem between the serial interfaces of Merida and Vargas. What is the cause of the problem?
- Authentication is required on the serial link.
- The encapsulation is misconfigured.
- The IP addresses are on different subnets.
- The serial interface on Vargas is shutdown.
- The loopback interfaces on both routers are not configured.
Exam with this question: CCNA Discovery 3: DRSEnt Chapter 7 Exam