ANS-C01 Exam Dumps : Amazon AWS Certified Advanced Networking - Specialty

This solution provides a scalable and flexible architecture that accommodates future growth while ensuring connectivity between regions and locations.

New Direct Connect Connection in London: Establishing a Direct Connect connection for the London office provides a high-performance, private, and reliable connection between the office and AWS.

Use the Existing Direct Connect Gateway: By attaching the new Direct Connect connection to the existing Direct Connect gateway, the solution leverages the existing infrastructure, reducing operational complexity.

Transit Gateway in eu-west-2: The transit gateway in eu-west-2 enables centralized routing and connectivity management for multiple VPCs in that Region.

Transit Gateway Peering: Peering the transit gateways inus-east-1andeu-west-2ensures seamless private connectivity between the regions, allowing users in the US and London to access workloads in both regions.

This design ensures low operational effort because it avoids creating and managing multiple individual VPN connections. It also supports future growth by allowing additional VPCs, regions, or office locations to connect with minimal configuration changes.

To use AWS PrivateLink, you need to create interface type VPC endpoints for the services that you want to access privately from your VPC1. These endpoints appear as elastic network interfaces (ENIs) with private IPs in your subnets2. To enable DNS resolution for these endpoints, you need to set the enableDnsSupport attribute to True for your VPC, and enable DNS support for each endpoint3. You also need to ensure that the VPC endpoint policy allows communication between your VPC and the service4. You do not need to create any route table entries or Route 53 hosted zones for the endpoints, as they are not required for PrivateLink5.

AWS PrivateLink FAQs – Amazon Web Services 2: AWS PrivateLink and service endpoint - Amazon EC2 Overview and Networking Introduction for Telecom Companies 3: VPC Endpoints: Secure and Direct Access to AWS Services 4: AWS PrivateLink and service endpoint - Amazon EC2 Overview and Networking Introduction for Telecom Companies 5: AWS Private Link vs VPC Endpoint - Stack Overflow

Inbound Rule 1 (Allow TCP 443 from 0.0.0.0/0): This rule allows all sources, including the public internet, to access the interface VPC endpoints. Since interface VPC endpoints are used within the VPC for communication with AWS services, this rule is unnecessarily permissive. Removing this rule enhances security while still allowing communication within the VPC using Rule 2 (TCP 443 from the VPC CIDR).

Outbound Rule 1 (Allow All Protocols, All Ports to 0.0.0.0/0): This rule is overly permissive and unnecessary for interface VPC endpoints, as traffic destined for AWS services through these endpoints does not need unrestricted outbound access. Removing this rule ensures that outbound traffic is limited to what is required for communication with the AWS services through the interface endpoints.