AWS Certified Advanced Networking Specialty Practice Exam

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Prepare for the AWS Certified Advanced Networking Specialty Exam with detailed flashcards and multiple-choice questions. Each question includes hints and explanations. Ace your exam with confidence!

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When using a Link Aggregation Group (LAG) with AWS Direct Connect, how many IPv4 BGP sessions are required per Virtual Interface (VIF)?

One per VIF
Two per VIF
None per VIF
Three per VIF

The correct answer is: One per VIF

In the context of AWS Direct Connect and Link Aggregation Groups (LAG), the requirement is to have one IPv4 BGP session per Virtual Interface (VIF). A Virtual Interface allows for the creation of a connection over AWS Direct Connect to your VPC or on-premises network. When configuring BGP for routing traffic, each VIF establishes a separate BGP session that is responsible for exchanging routing and reachability information. Thus, for each VIF you create, you need a dedicated BGP session to ensure proper communication and routing capabilities are functioning as expected. This setup provides clarity in routing and aids in the differentiation of traffic flows through the respective VIFs, leveraging the benefits of a reliable and efficient connection. Since each VIF operates independently, even with link aggregation combined, only one session is necessary for each VIF to establish its routes and manage traffic appropriately.