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Exam AWS-SysOps topic 1 question 15 discussion

Exam question from Amazon's AWS-SysOps
Question #: 15
Topic #: 1
[All AWS-SysOps Questions]

The majority of your Infrastructure is on premises and you have a small footprint on AWS Your company has decided to roll out a new application that is heavily dependent on low latency connectivity to LOAP for authentication Your security policy requires minimal changes to the company's existing application user management processes.
What option would you implement to successfully launch this application1?

  • A. Create a second, independent LOAP server in AWS for your application to use for authentication
  • B. Establish a VPN connection so your applications can authenticate against your existing on-premises LDAP servers
  • C. Establish a VPN connection between your data center and AWS create a LDAP replica on AWS and configure your application to use the LDAP replica for authentication
  • D. Create a second LDAP domain on AWS establish a VPN connection to establish a trust relationship between your new and existing domains and use the new domain for authentication
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Suggested Answer: B 🗳️
by FHU at May 17, 2021, 12:16 a.m.
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DAAJ
5 months ago
https://docs.aws.amazon.com/whitepapers/latest/best-practices-deploying-amazon-workspaces/ad-ds-deployment-scenarios.html Scenario 2 applies here and hence the correct answer is C- create a replica. VPN connection does not guarantee low latency. Creating a replica does not require much changes, if any, to existing on-premise LDAP service. Replica reduces latency of authentication/query requests to AD DS and the AD DS global catalog.
upvoted 1 times
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ablazleon
1 year, 7 months ago
Selected Answer: B
Laauch a new application => "AD Connector cannot be used with your custom applications, as it is only used for secure AWS integration for the three use-cases mentioned above. Custom applications relying on your on-premises Active Directory should communicate with your domain controllers directly" https://aws.amazon.com/blogs/security/how-to-connect-your-on-premises-active-directory-to-aws-using-ad-connector/
upvoted 3 times
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Shaktimaan
1 year, 11 months ago
B is correct. LDAP should not be replicated.
upvoted 1 times
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TroyMcLure
2 years ago
Correct Answer: C Establish a VPN connection between your data center and AWS create a LDAP replica on AWS and configure your application to use the LDAP replica for authentication. Since the new application will reside in AWS and it is heavily dependent on low latency connectivity to LOAP for authentication, better use a read replica.
upvoted 2 times
albert_kuo
5 months, 1 week ago
because of low latency requirement, I voted for C
upvoted 1 times
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FHU
2 years, 1 month ago
Letter B is correct. I don't think it is recommended to replicate LDAP data to AWS, like the other letters A, C and D are doing. https://aws.amazon.com/blogs/security/how-to-connect-your-on-premises-active-directory-to-aws-using-ad-connector/
upvoted 1 times
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C (25%)
B (20%)
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