Your users complain that they can NOT log into the newly installed compute server. You check the log files and see this line:

Jan 28 11:36:33 compserv in.telnetd[1430]: [ID 913506 daemon.warning] refused connect from
129.169.214.218 (name/address mismatch)

Which is a cause of this message?

A.
The system has been hacked.

B.
Another system on the network used the server’s address.

C.
The Telnet service has been disabled due to security problems.

D.
The forward and reverse DNS mappings used different IP addresses.