AWS Certified Advanced Networking Specialty Practice Exam

How many prefixes can a customer announce to AWS over an AWS Direct Connect Private Virtual Interface (VIF) per BGP session?

1. 500

2. 750

3. 1000

4. 1500

The correct answer is: 1000

The correct answer is 1000 prefixes that a customer can announce to AWS over an AWS Direct Connect Private Virtual Interface (VIF) per BGP (Border Gateway Protocol) session. This limit is important for managing routing and ensuring efficient data transfer within the AWS infrastructure. When a customer establishes a Direct Connect connection with a Private VIF, they are integrating their on-premises network with AWS services. By announcing prefixes over BGP, they can facilitate dynamic routing, making it easier to manage and adjust routes based on changing network conditions. The limit of 1000 prefixes is designed to maintain optimal performance and stability in the routing environment. It ensures that the routing tables are manageable and helps prevent issues that could arise from an excessively large number of prefixes being advertised, which can lead to increased complexity and potential routing instability. This number is indicative of best practices in network design, ensuring that the network remains efficient and responsive. Customers must be mindful of this prefix limit when configuring their routing policies to prevent route advertisements from exceeding the maximum allowed, which could hinder network connectivity and performance. Understanding this limitation is crucial for anyone working with AWS networking to ensure proper configuration and optimization of their Direct Connect setup.