You have deployed a web-server on EC2 instance with domain name as example.org. Since there are many subdomain created, you plan to use wildcard name with domain while creating these certificates using Amazon Certificate Manager. Which of the following are valid Domain Names which will be supported using an ACM certificate with wildcard *.example.org? (Select Two).

Answer options:

A.abc.example.org
B.example.com
C.example.org
D.login.example.org
E.error.login.example.org

Correct Answers: A and D
ACM supports wild card names while creating certificates. With an Asterix (*)in the leftmost part of the domain, it supports any subdomain up to 1 level. In the above case, wildcard *.example.org will protect the following sub-domains abc.example.org & login.example.org. It will not protect an apex domain example .org& two levels of sub-domain.
Option B is incorrect as *.example.org will protect the sub-domain for example.org & not example.com
Option C is incorrect as *.example.org will not protect the apex domain, example.org. For the apex domain, a separate certificate needs to be added.
Option E is incorrect as Wildcard name *.example.org supports only one level of sub-domains & not 2 levels.
For more information on Amazon Certificate Manager, refer to the following URLs-
https://docs.aws.amazon.com/acm/latest/userguide/acm-certificate.html