EC2 instances must use an on-premises DNS server for name resolution.
Apply the DNS server setting to VPC instances through DHCP.
Which configuration is most appropriate?
Create a custom DHCP options set with the corporate domain-name-servers value and associate it with the VPC.
Detailed explanation
TTL does not distribute resolver addresses to EC2 instances.
TTL does not distribute resolver addresses to EC2 instances.
CloudFront does not provide VPC DHCP option sets.
CloudFront does not provide VPC DHCP option sets.
Manual host files are difficult to keep consistent as the fleet grows.
Manual host files are difficult to keep consistent as the fleet grows.
The VPC DHCP options set distributes DNS server and domain settings to instances.
The VPC DHCP options set distributes DNS server and domain settings to instances.
Check official documentation
Compare the following points with the official documentation.
Amazon VPC DHCP option setsの公式説明を確認する。
What to confirm
DHCP配布とRoute 53名前解決の役割を分けられる。
Key points
- DHCP options set
- domain-name-servers
- VPC association
Notes
- Environment: AWS公式SOA-C03試験ガイドとAWS公式ドキュメントの確認
- Confirm current AWS service behavior in the official documentation.
Foundation review
Fleet configuration
DHCP applies the resolver setting consistently as instances launch.
DNS setting versus record
DHCP chooses a resolver; Route 53 records define names answered by a resolver.