Fortinet NSE7_ADA-6.3 Fortinet NSE 7 - Advanced Analytics 6.3 Exam Practice Test

The rule engine loads the baseline data values from the profile database. The profile database contains historical data that is used for baselining calculations, such as minimum, maximum, average, standard deviation, and percentile values for various metrics.

The syntax that will register a collector to the supervisor is phProvisionCollector --add . This command will initiate the registration process between the collector and the supervisor, and exchange certificates and configuration information. The parameter is the IP address of the supervisor node.

By default, the maximum number of event files stored on the collector in the event of a WAN link failure between the collector and the supervisor is 10.000. This value can be changed in the collector.properties file by modifying the parameter max_event_files_to_store. References: Fortinet NSE 7 - Advanced Analytics 6.3 Exam Description, page 13

The rule filters events with an event type that belong to the Domain Account Locked CMDB group and a reporting IP that belong to the Domain Controller applications group. This means that only events that have both criteria met will be processed by this rule. The event type and reporting IP are joined by an AND operator, which requires both conditions to be true.

The UEBA agent status shows that it has been operationally down for one day and three hours ago (1d3h). This means that it has been down for 24 hours plus three hours, which is equal to 21 hours.

The profile database contains CPU utilization values from day one. At midnight on the second day, the CPU utilization values from the daily database will be merged with the profile database using a weighted average formula:

New value = (Old value x Old weight) + (New value x New weight) / (Old weight + New weight)

The weight is determined by the number of days in each database. In this case, the profile database has one day of data and the daily database has one day of data, so the weight is equal for both databases. Therefore, the formula simplifies to:

New value = (Old value + New value) / 2

In the profile database, in the Hour of Day column where 9 is the value, the updated minimum, maximum, and average CPU utilization values are:

Min CPU Util = (32.31 + 32.31) / 2 = 32.31 Max CPU Util = (33.50 + 33.50) / 2 = 33.50 AVG CPU Util = (32.67 + 32.67) / 2 = 32.67

The collector processes are responsible for receiving, parsing, normalizing, correlating, and monitoring events from various sources. The collector processes are phParser, phRuleMaster, and phMonitorAgent.

The statements about collector communication with the FortiSIEM cluster that are true are:

• Collectors communicate periodically with the supervisor node. Collectors send heartbeat messages to the supervisor every 30 seconds to report their status and configuration.
• The supervisor periodically checks the health of the collector. The supervisor monitors the heartbeat messages from collectors and alerts if there is any issue with their connectivity or performance.
• Collectors upload event data to any node in the worker upload list, but report their health directly to the supervisor node. Collectors use a round-robin algorithm to distribute event data among worker nodes in the worker upload list, which is provided by the supervisor during registration. However, collectors only report their health and status to the supervisor node.

The incident was auto cleared because within five minutes, the packet loss percentage dropped to a level where the host IP of the original rule matches the host IP of the clear condition pattern. The clear condition pattern specifies that if there is an event with a packet loss percentage less than or equal to 10% and a host IP that matches any host IP in this incident, then clear this incident.

FortiSIEM allows EPS bursting to handle event spikes without dropping events or violating the license agreement. EPS bursting means that FortiSIEM will let you burst up to five times the licensed EPS at any given time, provided it has accumulated enough unused EPS from previous time intervals.