Final answer:
The command to filter log messages to a SYSLOG server is not given in the options, but it generally involves configuring a logging facility. The specific command varies by system or device, such as logging discriminators on Cisco devices.
Step-by-step explanation:
The command that allows you to filter log messages to a SYSLOG server is not provided among the options listed. However, such functionality typically involves configuring a logging facility on network devices or servers to manage and filter log messages based on certain criteria such as severity levels or message contents. The filtering command varies depending on the operating system or network device. In Cisco devices, for example, you can use logging discriminators to filter SYSLOG messages.