AWS Certified Advanced Networking Specialty Practice Exam

What routing mechanisms are supported by a Virtual Private Gateway (VGW)?

1. Open Shortest Path First (OSPF)

2. Border Gateway Protocol (BGP)

3. RIP (Routing Information Protocol)

4. Static Routes

The correct answer is: Border Gateway Protocol (BGP)

A Virtual Private Gateway (VGW) primarily supports Border Gateway Protocol (BGP) for dynamic routing. BGP is widely used in large-scale networks and is particularly effective for managing how packets are routed across the internet or between multiple autonomous systems, which is critical in AWS environments that require connections to on-premises data centers and other networks. Using BGP allows for adaptive routing, where routing paths can be adjusted dynamically based on network changes, faults, or varying traffic conditions. This is essential for ensuring optimal performance and reliability in hybrid cloud architectures. While static routes can be configured in a Virtual Private Gateway for specific paths, the primary mechanism that allows for dynamic route exchanges and the capability to handle multiple paths, load balancing, and failover is provided by BGP. This makes BGP the preferred choice for enterprises needing to establish VPNs and manage complex routing scenarios with agility and efficiency. In contrast, other routing mechanisms such as OSPF and RIP are not supported directly by VGW in AWS environments, which is why BGP is identified as the correct answer in this context.