You are working as a consultant for a company designing a new hybrid architecture to manage part of their application infrastructure in the cloud and on-premise. As part of the infrastructure, they need to transfer high amounts of data consistently. They require a low latency and high consistency traffic to AWS. The company is looking to keep costs as low as possible and is willing to accept slow traffic in the event of primary failure. Given these requirements, how would you design a hybrid architecture? Choose the correct answer from the options below.

Answer options:

A.Provision a Direct Connect connection to an AWS region using a Direct Connect partner. Provision a VPN connection as a backup in the event of Direct Connect connection failure.
B.Create a dual VPN tunnel for private connectivity, which increases network consistency and reduces latency. The dual tunnel provides a backup VPN in the case of primary failover.
C.Provision a Direct Connect connection which has automatic failover and backup built into the service.
D.Provision a Direct Connect connection to an AWS region using a Direct Connect provider. Provision a secondary Direct Connect connection as a failover.

Answer – A
AWS Direct Connect makes it easy to establish a dedicated network connection from your on-premises data center to AWS. i.e. You can establish private connectivity between AWS and the on-premises data center, which helps to reduce the overall network cost, increase bandwidth throughput, and provide a more consistent network experience than the internet-based connection. 
A VPN connection is a low-cost, appliance-based access to the AWS resources given to the on-premises resources via gateways. Compared to AWS Direct Connect, the VPN connection may experience slow connection speed and limited bandwidth due to unpredictability of the internet.
Since cost is a factor for the backup and the company does not mind the reduced traffic, the backup option can a VPN connection instead of another direct connect solution.
Option A is CORRECT because it sets up a Direct Connect as the primary connection that provides consistent bandwidth for transferring high amounts of data. In case of failure, it sets up a VPN which is a low-cost solution.
Option B is incorrect because VPN (although set up as dual) does not provide a low latency connection as it still has network unpredictability, and consistency as the Direct Connect would do.
Option C is incorrect because there is no automatic failover or redundancy in Direct Connect.
Option D is incorrect because setting up two Direct Connect connections would be costly.
For more information on AWS direct connect, browse to the below URL-
https://aws.amazon.com/directconnect/