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Answer: Set up one AWS Direct Connect connection from the data center to AWS. Create a transit gateway, and attach each VPC to the transit gateway. Establish connectivity between the Direct Connect connection and the transit gateway.
## Explanation **Option D is the correct answer** because it provides the most cost-effective solution that meets all requirements: ### Key Requirements Analysis: 1. **Three separate VPCs** in us-east-1 Region 2. **Inter-VPC communication** required 3. **Consistent data transfer** of hundreds of gigabytes daily 4. **Latency-sensitive** application on-premises 5. **Maximize cost-effectiveness** ### Why Option D is Best: 1. **Single Direct Connect Connection**: Using one Direct Connect connection is more cost-effective than three separate connections (Option C) or three VPN connections (Option A). 2. **Transit Gateway Benefits**: - Provides centralized connectivity between all three VPCs - Enables inter-VPC communication through the transit gateway - Single connection point for the Direct Connect - Simplifies network management 3. **Performance for Latency-Sensitive Applications**: - Direct Connect provides dedicated, low-latency connectivity - Consistent performance for hundreds of gigabytes of daily data transfer - More reliable than VPN connections which can have variable latency 4. **Cost Optimization**: - One Direct Connect connection instead of three - No need for third-party virtual appliances (Option B) - No multiple VPN connections (Option A) - No multiple Direct Connect connections (Option C) ### Why Other Options Are Not Optimal: **Option A**: Three VPN connections would be expensive, have higher latency, and less consistent performance for latency-sensitive applications transferring large amounts of data. **Option B**: Third-party virtual appliances add licensing costs, management overhead, and potential performance bottlenecks. **Option C**: Three Direct Connect connections are unnecessarily expensive when a single connection with transit gateway can serve all VPCs. ### Architecture Components: - **AWS Direct Connect**: Provides dedicated network connection from on-premises to AWS - **Transit Gateway**: Central network hub connecting multiple VPCs and the Direct Connect connection - **VPC Attachments**: Each VPC connects to the transit gateway - **Direct Connect Gateway**: Connects the Direct Connect to the transit gateway This solution provides the best balance of performance, reliability, and cost-effectiveness for the given requirements.
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A company is running several business applications in three separate VPCs within the us-east-1 Region. The applications must be able to communicate between VPCs. The applications also must be able to consistently send hundreds of gigabytes of data each day to a latency-sensitive application that runs in a single on-premises data center.
A solutions architect needs to design a network connectivity solution that maximizes cost-effectiveness.
Which solution meets these requirements?
A
Configure three AWS Site-to-Site VPN connections from the data center to AWS. Establish connectivity by configuring one VPN connection for each VPC.
B
Launch a third-party virtual network appliance in each VPC. Establish an IPsec VPN tunnel between the data center and each virtual appliance.
C
Set up three AWS Direct Connect connections from the data center to a Direct Connect gateway in us-east-1. Establish connectivity by configuring each VPC to use one of the Direct Connect connections.
D
Set up one AWS Direct Connect connection from the data center to AWS. Create a transit gateway, and attach each VPC to the transit gateway. Establish connectivity between the Direct Connect connection and the transit gateway.