A financial services company hosts its real-time market data ingestion application in VPC-… — AWS Certified Solutions Architect - Professional

A financial services company hosts its real-time market data ingestion application in VPC-A ( $us-east-1$ ) and its latency-critical analytics engine in VPC-B ( $us-east-1$ ). Currently, an AWS Transit Gateway is used to route traffic between the two VPCs. Additionally, the ingestion application in VPC-A continuously receives real-time trade feeds from an on-premises datacenter in Chicago via a $10\text{ Gbps}$ AWS Direct Connect connection. This hybrid traffic traverses an AWS Direct Connect Gateway associated with the Transit Gateway via a Transit Virtual Interface (Transit VIF).

Performance testing reveals that data transfers between VPC-A and VPC-B are bottlenecked and cannot exceed $10\text{ Gbps}$ , while latency-sensitive feeds from the on-premises datacenter to VPC-A suffer from a $2\text{ ms}$ routing overhead introduced by the Transit Gateway. The company requires a solution that maximizes inter-VPC throughput and reduces hybrid connectivity latency to the absolute minimum.

Which combination of actions should the Solutions Architect take to meet these requirements? (Select TWO.)

Establish a VPC Peering connection between VPC-A and VPC-B, configure the instance operating systems to use a Maximum Transmission Unit (MTU) of 9001, and route the inter-VPC traffic through the peering connection.Answer
Deploy a Direct Connect Gateway, configure a Private Virtual Interface (Private VIF) on the Direct Connect connection, and associate the Direct Connect Gateway with the Virtual Private Gateway (VGW) attached to VPC-A.Answer
C
Configure a Private Virtual Interface (Private VIF) on the Direct Connect connection and associate it with the Transit Gateway to route the hybrid traffic directly to VPC-A.
D
Route the inter-VPC traffic through an intermediate Application Load Balancer (ALB) in VPC-A, and request support pre-warming to handle the high throughput spikes between VPC-A and VPC-B.
E
Associate the Route 53 Private Hosted Zone of VPC-A with VPC-B, and route traffic through the Transit Gateway using the newly resolved private IP addresses.

Answer

The correct actions are to establish a VPC Peering connection between VPC-A and VPC-B with an MTU of 9001, and to deploy a Direct Connect Gateway with a Private Virtual Interface associated with the Virtual Private Gateway of VPC-A.

The correct solution involves two distinct optimizations. First, establishing a VPC Peering connection between VPC-A and VPC-B allows direct instance-to-instance communication bypassing the Transit Gateway, which eliminates routing hops and latency. VPC Peering natively supports Jumbo Frames (MTU 9001) for inter-VPC traffic within the same region, maximizing throughput. Second, since hybrid traffic from the on-premises datacenter only targets VPC-A, replacing the Transit VIF and Transit Gateway route with a Direct Connect Private VIF attached to a Direct Connect Gateway associated with VPC-A's Virtual Private Gateway (VGW) removes the Transit Gateway from the path. This eliminates the 2 ms processing latency introduced by the Transit Gateway.

Step-by-Step Solution

Analyze the inter-VPC bottleneck between VPC-A and VPC-B.

Identify that Transit Gateway adds processing overhead and extra routing hops. Replacing it with a direct VPC Peering connection provides the lowest possible latency and supports Jumbo Frames (MTU 9001) for maximum throughput in the same region.

To resolve the inter-VPC throughput limit and minimize latency between the two VPCs in the same region.

Analyze the hybrid latency overhead between the Chicago datacenter and VPC-A.

Identify that Transit Gateway introduces a 2 ms processing overhead. Since on-premises traffic only needs to reach VPC-A, bypass the Transit Gateway by using a Direct Connect Private Virtual Interface (Private VIF) associated with a Virtual Private Gateway (VGW) on VPC-A via a Direct Connect Gateway.

To eliminate Transit Gateway latency for the hybrid path to the single target VPC.

Key Concept

Optimizing hybrid and inter-VPC network performance by choosing the correct virtual interfaces (Private VIF vs Transit VIF) and routing architectures (VPC Peering vs Transit Gateway) to minimize latency and maximize throughput using MTU configurations.

Estimated Time:3m 0s

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Topics