A Company Has Deployed a Custom DNS Server in AWS

question 61

Multiple Choice

A company has deployed a custom DNS server in AWS. The Security Engineer wants to ensure that Amazon EC2 instances cannot use the Amazon-provided DNS. How can the Security Engineer block access to the Amazon-provided DNS in the VPC?

• A) Deny access to the Amazon DNS IP within all security groups.
• B) Add a rule to all network access control lists that deny access to the Amazon DNS IP.
• C) Add a route to all route tables that black holes traffic to the Amazon DNS IP.
• D) Disable DNS resolution within the VPC configuration.

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