AWS Certified Advanced Networking – Specialty (ANS-C01) — Question 208
A company has many application VPCs that use AWS Site-to-Site VPN connections for connectivity to an on-premises location. The company’s network team wants to gradually migrate to AWS Transit Gateway to provide VPC-to-VPC connectivity.
The network team sets up a transit gateway that uses equal-cost multi-path (ECMP) routing. The network team attaches two temporary VPCs to the transit gateway for testing. The test VPCs contain Amazon EC2 instances to confirm connectivity over the transit gateway between the on-premises location and the VPCs. The network team creates two new Site-to-Site VPN connections to the transit gateway.
During testing, the network team cannot reach the required bandwidth of 2.5 Gbps over the pair of new Site-o-Site VPN connections.
Which combination of steps should the network team take to improve bandwidth performance and minimize network congestion? (Choose three.)
Answer options
- A. Enable acceleration for the existing Site-to-Site VPN connections to the transit gateway.
- B. Create new accelerated Site-to-Site VPN connections to the transit gateway.
- C. Advertise the on-premises prefix to AWS with the same BGP AS_PATH attribute across all the Site-to-Site VPN connections.
- D. Advertise the on-premises prefix to AWS with a different BGP AS_PATH attribute across all the Site-to-Site VPN connections.
- E. Verify that the transit gateway attachments are present in the Availability Zones of the test VPC.
- F. Verify that the on-premises location is sending traffic by using multiple lows.
Correct answer: B, C, F
Explanation
The correct steps to enhance bandwidth are B, C, and F. Creating new accelerated Site-to-Site VPN connections (B) allows for increased performance. Advertising the on-premises prefix with the same BGP AS_PATH attribute (C) ensures that all connections are treated equally for load balancing. Verifying that the on-premises location is sending traffic using multiple lows (F) confirms that traffic is being efficiently utilized. Options A, D, and E do not directly address the bandwidth issue or may introduce further complications.