Symmetric Traffic Flow with SNAT:
In active-active (A-A) clusters, symmetric traffic flow is essential for maintaining session integrity across multiple instances. Source Network Address Translation (SNAT) is performed inbound to ensure that return traffic is routed correctly (Option A).
Load Balancer Requirement:
A-A clusters require a load balancer to distribute incoming traffic evenly across the active instances. This is crucial for balancing the load and providing high availability (Option C).
API Calls and Failovers:
Option B is incorrect because failovers in A-A clusters do not typically rely on API calls but are managed by the load balancer and the clustering mechanism itself.
Software-Defined Network (SDN) Failover:
Option D is incorrect as SDN is not specifically required for performing failovers in A-A clusters. The failover mechanism is typically managed by the load balancer and FortiGate's clustering technology.
Reference:
FortiGate High Availability on AWS: FortiGate HA
AWS Elastic Load Balancing: AWS ELB

FortiGate Cloud-Native Firewall (CNF):
FortiGate CNF offers cloud-native firewall capabilities designed to provide network security within AWS. It integrates seamlessly with AWS services and offers advanced threat protection and traffic management (Option C).
Fortinet Managed Rules for AWS WAF:
Fortinet Managed Rules for AWS WAF provide pre-configured, updated security rules that protect web applications from common threats such as SQL injection and cross-site scripting. This offering simplifies the protection of web applications hosted on AWS (Option D).
FortiWeb Cloud:
FortiWeb Cloud is a Web Application Firewall (WAF) as a service that provides comprehensive protection for web applications hosted on AWS. It offers features such as bot mitigation, DDoS protection, and deep inspection of HTTP/HTTPS traffic (Option E).
Comparison with Other Options:
Option A (AWS WAF) is a native AWS service, not a Fortinet offering.
Option B (FortiEDR) is focused on endpoint detection and response, which is not specifically aimed at protecting web applications.
Reference:
FortiGate CNF Documentation: FortiGate CNF
Fortinet Managed Rules for AWS WAF: Fortinet AWS WAF Rules
FortiWeb Cloud Overview: FortiWeb Cloud

AWS GuardDuty Integration:
AWS GuardDuty is a threat detection service that continuously monitors for malicious activity and unauthorized behavior to protect AWS accounts and workloads. It can generate findings that can be used to create or update firewall rules automatically in FortiGate to enhance security and provide timely protection (Option D).
Integration with FortiGate:
GuardDuty findings can be integrated with FortiGate using automation tools and scripts to create firewall rules dynamically, thereby accelerating the time-to-protection against emerging threats.
Other Options Analysis:
Option A (AWS Firewall Manager) is more suited for managing rules across multiple accounts but not for dynamic threat response.
Option B (AWS Network ACL) provides stateless filtering but does not offer automated rule creation.
Option C (SDN Connector for AWS) helps in integrating SDN capabilities but is not specifically focused on threat-based rule automation.
Reference:
AWS GuardDuty: AWS GuardDuty
FortiGate Integration: Fortinet Integration

VPC-Scoped Protection:
When deploying a FortiWeb VM inside a Virtual Private Cloud (VPC), the security and protection it offers are limited to the applications and traffic that pass through that specific VPC. This means that any applications outside this VPC will not benefit from the protection of FortiWeb VM (Option D).
Comparison with FortiWeb Cloud:
FortiWeb Cloud, being a cloud-native WAF-as-a-Service, can protect applications regardless of their VPC location, offering broader and more flexible protection capabilities.
Other Options Analysis:
Option A is incorrect because both FortiWeb VM and FortiWeb Cloud protect against OWASP Top 10 threats.
Option B is incorrect because FortiWeb VM does support zero-day protection.
Option C is incorrect as the performance of FortiWeb VM in applying advanced WAF protection is not inherently slower compared to FortiWeb Cloud.
Reference:
FortiWeb Overview: FortiWeb