You work as the Network Administrator for XYZ CORP.

In Unix, the /etc/securetty file is used to identify the secure terminals from where the root can be allowed to log in. Answer: B is incorrect. In Unix, the /etc/ioports file shows which I/O ports are in use at the moment. Answer: A is incorrect. In Unix, the /etc/services file is the configuration file that lists the network services that the system supports. Answer: C is incorrect. In Unix, the /proc/interrupts file is the configuration file that shows the interrupts in use and how many of each there has been.