ANS-C01 Question #167: Real Exam Question with Answer & Explanation

Question

A company is migrating applications from a data center to AWS. Many of the applications will need to exchange data with the company's on-premises mainframe. The company needs to achieve 4 Gbps transfer speeds to meet peak traffic demands. A network engineer must design a highly available solution that maximizes resiliency. The solution must be able to withstand the loss of circuits or routers. Which solution will meet these requirements?

Options

• AOrder four 10 Gbps AWS Direct Connect connections that are evenly spread over two locations.
• BOrder two 10 Gbps AWS Direct Connect connections that are evenly spread over two locations.
• COrder four 1 Gbps AWS Direct Connect connections that are evenly spread over two locations.
• DOrder two 1 Gbps AWS Direct Connect connections that are evenly spread over two locations.

Explanation

To achieve 4 Gbps transfer speeds with high availability and resiliency for on-premises to AWS communication, two 10 Gbps AWS Direct Connect connections should be ordered and spread across two different Direct Connect locations.

Common mistakes.

• A. While effective, four 10 Gbps connections are over-provisioned and more expensive than necessary to meet a 4 Gbps requirement with high availability, as two 10 Gbps connections suffice.
• C. Four 1 Gbps connections provide exactly 4 Gbps total bandwidth but offer limited failover capacity, as the loss of a single connection could reduce bandwidth below the peak demand, and they do not match the resiliency of 10 Gbps links.
• D. Two 1 Gbps connections provide only 2 Gbps total bandwidth, which is less than the required 4 Gbps peak transfer speed, making this option insufficient to meet performance requirements.

Concept tested. Direct Connect Resiliency and Bandwidth Planning

Reference. https://aws.amazon.com/directconnect/faqs/

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