AWS Certified Advanced Networking Specialty Practice Exam

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Prepare for the AWS Certified Advanced Networking Specialty Exam with detailed flashcards and multiple-choice questions. Each question includes hints and explanations. Ace your exam with confidence!

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What is a preferable configuration for a client-to-site VPN using an EC2 instance for accessing AWS resources?

Configure the client to use a dynamic IP address for EC2
Use the instance's public DNS name as the endpoint
Configure the client software to use an EC2 elastic IP as VPN termination endpoint
Keep the instance’s default security group settings

The correct answer is: Configure the client software to use an EC2 elastic IP as VPN termination endpoint

Configuring the client software to use an EC2 elastic IP as the VPN termination endpoint is a preferable choice when setting up a client-to-site VPN. An elastic IP is a static, public IPv4 address designed for dynamic cloud computing. This ensures that the VPN endpoint remains consistent, simplifying connectivity for clients. As users connect to the VPN, they rely on a reliable, unchanging public address to reach the EC2 instance hosting the VPN service. This configuration becomes particularly important if the EC2 instance needs to be restarted or if it experiences any issues. Without an elastic IP, the public IP of the EC2 instance could change, causing disruptions in service as users would need to update their client configurations to establish a new connection. Additionally, using an elastic IP provides enhanced robustness and predictability for users accessing AWS resources through the VPN. For a client-to-site VPN, it’s critical to maintain connectivity and reliability, which an elastic IP effectively provides.