Fortinet NSE5_FSM-6.3 Exam Dumps

Rule Evaluation in FortiSIEM: Rules in FortiSIEM are evaluated periodically to check if the defined conditions or subpatterns are met.

Frequency Field: The Frequency field in a rule determines the interval at which the rule's subpattern will be evaluated.

Evaluation Interval: This defines how often the system will check the incoming events against the rule's subpattern to determine if an incident should be triggered.

Impact on Performance: Setting an appropriate frequency is crucial to balance between timely detection of incidents and system performance.

Examples:

If the Frequency is set to 5 minutes, the rule will evaluate the subpattern every 5 minutes.

This means that every 5 minutes, the system will check if the conditions defined in the subpattern are met by the incoming events.

Reference: FortiSIEM 6.3 User Guide, Rules and Incidents section, which explains the Frequency field and how it impacts the evaluation of subpatterns in rules.

Expression Builder in FortiSIEM: The Expression Builder is used to create expressions for analyzing event data.

Correct Syntax: The correct syntax for counting matched events is COUNT(Matched Events).

Function: COUNT is a function that takes a parameter, in this case, 'Matched Events,' to count the number of occurrences.

Common Errors: Incorrect syntax, such as reversing the order or using parentheses improperly, can lead to invalid expressions.

Reference: FortiSIEM 6.3 User Guide, Expression Builder section, which explains the correct syntax and usage for creating valid expressions for event analysis.

Grouping Attributes in Reports: When creating reports in FortiSIEM, certain attributes can be grouped to summarize and organize the data.

Unique Attributes: Attributes that are unique for each event cannot be grouped because they do not provide a meaningful aggregation or summary.

Red Highlighting Explanation: The red highlighting in the exhibit indicates attributes that cannot be grouped together due to their unique nature. These unique attributes include Event Receive Time, Reporting IP, Event Type, Raw Event Log, and COUNT(Matched Events).

Attribute Characteristics:

Event Receive Time is unique for each event.

Reporting IP and Event Type can vary greatly, making grouping them impractical in this context.

Raw Event Log represents the unprocessed log data, which is also unique.

COUNT(Matched Events) is a calculated field, not suitable for grouping.

Reference: FortiSIEM 6.3 User Guide, Reporting section, explains the constraints on grouping attributes in reports.