Final answer:
Alert categories commonly include Informational, Medium, and Critical; Partial is not typically a category of alerts in system monitoring.
Step-by-step explanation:
The categories of alerts typically recognized in systems monitoring and incident response include Informational, Medium, and Critical. An Informational alert may indicate a successful system operation or a logged non-critical event. A Medium alert signals a warning that may require attention but does not indicate an immediate threat. Meanwhile, a Critical alert denotes a severe issue which requires immediate action. The option 'Partial' does not commonly describe a category of alert in the context of system monitoring and incident response.