Domain Registration

Correct Answer: B. Elastic IP Address

An Elastic IP Address is required because it provides a static IP address that can be associated with the EC2 instance hosting the web application. This guarantees that the IP address won't change, and the application can be reliably accessed using the registered domain.

Correct Answer: Use Amazon Route 53: create multiple records with the same name in the hosted zone (for example, A/AAAA alias records to the regional load balancers) and apply a routing policy such as latency-based or failover so users are routed to the nearest healthy Region.

Route 53 lets you publish a single DNS name and create multiple records with that same name that point to different regional endpoints. By using latency-based or failover routing (and Evaluate Target Health/ELB health where applicable), Route 53 will direct clients to the closest healthy Region while presenting one global domain. Domains are not region-scoped, so registering per Region is incorrect. You cannot assign a single FQDN directly to multiple EC2 instances without DNS. Elastic Beanstalk environments expose region-specific CNAMEs; to use a single global name, you still front them with Route 53.

Correct Answer: D. Request an SSL/TLS certificate from Amazon Certificate Manager

By requesting an SSL/TLS certificate from Amazon Certificate Manager, the e-commerce website can ensure that website traffic is encrypted over HTTPS. This is a more efficient and integrated approach than purchasing from a third-party or using a self-signed certificate.