A media firm is launching its online digital entertainment channel which will be launched in five different languages. For this digital content sharing, web applications will be deployed in EC2 instances spread across multiple AZ. ELB will be used as a front-end service to handle all user requests. All traffic between users & ELB should be over a secure channel. For different languages, they have registered multiple domains with AWS Route 53. The client needs to host multiple domains on ELB. Which of the following can be used for ELB to support multiple domains? (Select Three.)

Answer options:

A.Add Subject Alternative Name for additional domains to be used with ELB.B.Add additional certificates to the certificate list.
C.Use default certificates for the root domain & additional certificates for subdomains.
D.Use Default certificate with ELB.E.Use Wildcard Certificate for all domains. 

Correct Answer – A, B and E
ELB can be configured as an HTTPS Listener to have secure HTTPS communication between client & ELB instead of having encryption at the server level. For HTTPS listeners, SSL/TLS certificate needs to be specified. To deploy multiple domains on a single ELB, any of the following needs to be done to specify the certificate.
1)Specify additional certificates apart from the Default certificate.
2)Use Wildcard certificate which will cover all domains.
3)Use Subject Alternative Name (SAN) for each additional domain.
Option C is incorrect as the Default certificate can be used only if there is no matching certificate in the certificate list & not for multiple domains with root & subdomains.
Option D is incorrect as the Default Certificate will be used for only one domain & not for multiple domains.
For more information on creating HTTPS Listener for ALB, refer to the following URL
https://docs.aws.amazon.com/elasticloadbalancing/latest/application//create-https-listener.html