Which statement is true regarding an auto scaling Palo Alto Networks NGFW deployment in AWS?

The statement about CloudWatch triggering VM-Series scale-out events is accurate. In an auto-scaling deployment of Palo Alto Networks Next-Generation Firewalls (NGFWs) within an AWS environment, Amazon CloudWatch plays a crucial role in monitoring the performance and health of the instances. CloudWatch can be configured to track specific metrics, such as CPU utilization, network traffic, and other vital indicators of instance performance.

When these metrics reach predefined thresholds indicating that additional resources are required, CloudWatch can automatically initiate scaling actions, which involves the deployment of additional VM-Series firewalls to handle increased traffic or load. This automatic scaling is essential for maintaining optimal performance and ensures that the network can accommodate demand without human intervention.

In contrast, while CloudWatch metrics can alert administrators and may be part of a broader monitoring solution, the primary function in an auto-scaling context is to trigger scale-out events, making the selected statement the most relevant in the context of dynamic resource management within AWS.