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Link Aggregation Groups

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A Link Aggregation Group (LAG) is a feature of AWS Direct Connect that allows you to bundle multiple connections to increase the total available bandwidth and provide redundancy to your network. LAGs can be created using multiple Direct Connect connections of the same capacity, which are then combi…

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AWS Certified Solutions Architect - Link Aggregation Groups Example Questions

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Question 1

A user wants to increase their on-premises server's bandwidth to AWS over a dedicated connection. They currently have an existing 1Gbps AWS Direct Connect connection. How can they achieve this while maintaining redundancy and high availability?

Correct Answer: Create a new 1Gbps connection and use Link Aggregation Group (LAG) to bundle the connections.

Creating a new 1Gbps connection and using LAG to bundle the connections will allow the user to increase bandwidth while maintaining redundancy and high availability. Upgrading the connection to 10Gbps won't provide redundancy. AWS VPN, VPC peering, and Global Accelerator do not provide the same dedicated connections as Direct Connect and LAG.

Question 2

A company needs to aggregate multiple dedicated network connections from its on-premises data center to AWS to increase bandwidth and provide redundancy using Link Aggregation Groups (LAG). Which AWS service should they use?

Correct Answer: AWS Direct Connect

Link Aggregation Groups (LAG) are a feature of AWS Direct Connect that let you combine multiple dedicated Direct Connect connections at a single AWS Direct Connect location into a single managed connection. This increases aggregate bandwidth and provides redundancy and failover across the member links. Amazon Connect is a contact center service and does not provide network link aggregation. AWS Transit Gateway enables hub-and-spoke routing between VPCs and on-premises networks but does not implement LAG itself. Amazon VPC provides isolated networking within AWS and does not manage physical link aggregation.

Question 3

An organization is migrating their on-premises infrastructure to AWS. The migration requires two separate 1-Gbps connections to different AWS regions. What is the most cost-effective solution for establishing these connections with higher throughput and redundancy?

Correct Answer: Create two 1-Gbps Direct Connect connections and use two Link Aggregation Groups (LAGs).

Creating two separate 1-Gbps Direct Connect connections and using two LAGs will provide higher throughput and redundancy while being cost-effective. The alternative options do not address both the redundancy and throughput requirements or do not provide the same level of dedicated connections as Direct Connect.

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