AWS Certified Advanced Networking Specialty Practice Exam

Which solution allows for internal and external accessibility of the same domain name in a split-view DNS setup across multiple VPCs?

1. Create public hosted zones only

2. Create Amazon Route 53 private and public hosted zones with the same name

3. Use AWS Lambda for routing

4. Implement a VPN-only access model

The correct answer is: Create Amazon Route 53 private and public hosted zones with the same name

In a split-view DNS setup, the goal is to provide different DNS results based on whether the query is coming from an internal (private) network or an external (public) network while using the same domain name. The correct solution involves creating both private and public hosted zones in Amazon Route 53 with the same name. Creating a public hosted zone alone would only cater to external accessibility, meaning that users making requests from the external internet would receive the DNS records defined in that public zone. However, internal users within a VPC would not be able to resolve names through public zones, leading to potential accessibility issues. By having both a private hosted zone and a public hosted zone with the same domain name, internal resources can be resolved appropriately within the VPC using the private hosted zone, while external clients can access the same domain through the public hosted zone. This dual approach effectively serves both internal and external access needs while maintaining the use of the same domain name, thereby achieving the split-view functionality desired. Using AWS Lambda for routing does not directly relate to DNS resolution in the same way and would not provide the necessary split-view capability for DNS queries. Similarly, implementing a VPN-only access model would limit external accessibility altogether, which contradicts the requirement of having the