NSE6_WCS-7.0 Questions and Answers

Understanding the Requirement:

The organization needs to connect a data VPC to the on-premises infrastructure with high bandwidth.

The solution should avoid multiple connections between sites.

Transit Gateway Connect:

Transit Gateway Connect is designed to integrate with SD-WAN networks and provides scalable bandwidth using GRE tunnels.

It simplifies hybrid cloud connectivity by allowing high bandwidth connections without the need for multiple physical connections.

Benefits of Transit Gateway Connect:

Supports scalable bandwidth through GRE tunnels.

Facilitates seamless integration with on-premises and cloud environments.

Reduces complexity by avoiding the need for multiple VPN connections.

Comparison with Other Options:

Option A (Transit VPC with IPSec) is not preferred due to complexity and potential limitations in bandwidth scalability.

Option B (Internet Gateway) is not suitable for private, high-bandwidth connections.

Option C (Transit Gateway multicast) does not address the requirement for high bandwidth in a hybrid cloud setup.

References:

AWS Transit Gateway Documentation: AWS Transit Gateway Connect

Hybrid Cloud Connectivity: AWS Hybrid Cloud

DNS Configuration:

For FortiWeb Cloud to effectively protect web applications, the DNS records for the application servers must be configured to point to FortiWeb Cloud. This ensures that all incoming traffic is routed through FortiWeb Cloud for inspection and protection (Option A).

Traffic Filtering:

FortiWeb Cloud provides robust protection by filtering incoming traffic to block the OWASP Top 10 attacks, zero-day threats, and other application layer attacks. This ensures the security and integrity of the web applications it protects (Option B).

Other Options Analysis:

Option C is incorrect because FortiWeb Cloud can protect application servers across different VPCs or regions, not just within the same VPC.

Option D is incorrect because step 2 does not require an AWS S3 bucket; it refers to the inspection and filtering of incoming traffic.

References:

FortiWeb Cloud Overview: FortiWeb Cloud

DNS Configuration for Web Applications: DNS Configuration

HA Cluster in AWS Cloud:

Deploying an active-passive HA cluster in AWS requires careful consideration of the clustering protocol used to ensure seamless failover and traffic flow.

Unicast FortiGate Clustering Protocol (FGCP):

Unicast FGCP is specifically designed for environments where multicast traffic is not feasible or supported, such as in the AWS cloud. Using unicast FGCP ensures that heartbeat and synchronization traffic between the cluster members are managed correctly over unicast communication, which is suitable for AWS's network infrastructure (Option C).

Comparison with Other Options:

Option A is incorrect because while placing both cluster members in the same availability zone might be required for certain configurations, it is not the critical factor for HA formation.

Option B is incorrect as VDOM exceptions are not directly related to the successful formation of HA.

Option D is incorrect because the ELB configuration checks are more about ensuring that the load balancer correctly routes traffic but do not specifically ensure HA formation and failover.

References:

FortiGate HA in AWS Documentation: FortiGate HA

Fortinet FGCP Details: FGCP Documentation

Instance Metadata Traffic:

VPC flow logs do not capture traffic to and from the link-local address 169.254.169.254, which is used for accessing instance metadata (Option A).

DHCP Traffic:

DHCP traffic is not captured by VPC flow logs. This is because DHCP relies on broadcast and multicast traffic, which is excluded from flow logs (Option B).

Security Monitoring:

VPC flow logs can be used as a security tool to monitor the traffic that is reaching the instances. By analyzing the flow logs, administrators can detect suspicious activities and troubleshoot connectivity issues (Option D).

Other Considerations:

Option C is incorrect because flow logs do capture traffic to the reserved IP address of the default VPC router.

Option E is incorrect as VPC flow logs do not provide real-time log streams but rather capture data at intervals and deliver them to CloudWatch or S3.

References:

AWS VPC Flow Logs Documentation: VPC Flow Logs

AWS Networking and Security: AWS Security Monitoring

Understanding VPC Peering:

VPC peering connections allow instances in one VPC to communicate with instances in another VPC. Peering is a one-to-one relationship between two VPCs.

Transit Routing Limitation:

AWS VPC peering connections do not support transitive peering. This means that a packet originating in VPC B cannot be routed through VPC A to reach VPC C. Each pair of VPCs must have its own peering connection.

Routing Table Configuration:

Even if you add a route in the VPC A routing table for the 192.168.0.0/16 network, it won't allow VPC B to communicate with VPC C because of the non-transitive nature of VPC peering.

Comparison with Other Options:

Option A is incorrect because adding a route in VPC A does not overcome the limitation of non-transitive peering.

Option C is incorrect because associating pcx-23232323 with VPC B is not how VPC peering works.

Option D is incorrect because you can create a separate peering connection between VPC B and VPC C, which is the required approach for communication between these VPCs.

References:

AWS VPC Peering Guide: VPC Peering

Limitations of VPC Peering: AWS VPC Peering Limitations