Refer to the exhibit. Host C is able to ping 127.0.0.1 successfully, but is unable to communicate with hosts A and B in the organization. What is the likely cause of the problem?

- Hosts A and B are not on the same subnet as host C.
- The IP addresses on the router serial interfaces are wrong.
- The subnet mask on host C is improperly configured.
- The FastEthernet interface fa0/0 of router 1 is wrongly configured.
Related exam: Network Fundamentals - CCNA Exploration 1: ENetwork Final Exam
