What does the error message "Host requires encryption mode enabled" typically indicate in a network or server environment?
a) The host server is configured to require encryption for secure communication, and the current connection does not meet this requirement.
b) The host server is unable to establish a connection due to a hardware malfunction.
c) The encryption mode is disabled due to outdated software on the host server.
d) The host server is experiencing a software crash and needs a restart.