What is the most likely cause?

You work as a Network Administrator for ABC Inc. The company has a TCP/IP-based network. A Cisco switch is configured on the network. You change the original host name of the switch through the hostname command. The prompt displays the changed host name. After some time, power of the switch went off due to some reason. When power restored, you find that the prompt is displaying the old host name.

What is the most likely cause?
A . The running-config file got corrupted.
B . The changes were saved in running-config file.
C . The startup-config file got corrupted.
D . Host name cannot be changed permanently once switch is configured.

Answer: B