AWS Certified Advanced Networking Specialty Practice Exam

What is the benefit of using Route 53 Resolver DNS Firewall?

1. Provides CloudFront caching

2. Prevents unwanted outbound DNS queries

3. Enables global reach for DNS queries

4. Improves VPC peering connectivity

The correct answer is: Prevents unwanted outbound DNS queries

The benefit of using Route 53 Resolver DNS Firewall is that it prevents unwanted outbound DNS queries. This feature is crucial for maintaining a secure networking environment, as it allows organizations to filter and control DNS traffic both to and from their virtual private clouds (VPCs). By using a DNS firewall, you can block DNS queries that originate from your VPC to domains that are known to be malicious or unauthorized. This helps to mitigate the risk of data exfiltration, malware communications, and other potential threats that could arise from unfiltered DNS traffic. Ultimately, it enhances overall network security by ensuring that only legitimate DNS resolutions are permitted, thus protecting your resources from external threats. In contrast, options related to caching, global reach, or improving VPC connectivity do not pertain to the specific security-focused functionality of the DNS Firewall, which is designed to control and secure DNS query behavior.