AWS Certified Advanced Networking – Specialty (ANS-C01)Network DesignHard
A large-scale data analytics company needs to migrate a legacy application to AWS. This application relies heavily on IP multicast for service discovery and data distribution among its components. The company has identified that standard AWS VPC networking does not natively support IP multicast. Which AWS networking component can facilitate IP multicast traffic within and across VPCs?
- AAmazon Route 53 Resolver Endpoints for multicast routing.
- BVPC Peering connections configured for multicast.
- CAWS Transit Gateway with multicast domains.
- DAWS Direct Connect Gateway with VPN CloudHub.
Show answer & explanationAnswer & explanation
Correct answer: C. AWS Transit Gateway with multicast domains.
AWS Transit Gateway supports IP multicast, allowing you to create multicast domains where instances can send and receive multicast traffic. This is the only native AWS service that provides multicast routing within and across VPCs, making it ideal for migrating legacy applications dependent on multicast.
Why the other options are wrong
- A. Route 53 Resolver Endpoints are for DNS resolution, not for routing IP multicast traffic.
- B. VPC Peering does not support IP multicast traffic and is a point-to-point connection, not a multicast hub.
- D. Direct Connect Gateway with VPN CloudHub is for hybrid connectivity and VPN aggregation, not for facilitating IP multicast within AWS VPCs.
Transit Gateway Multicast
A feature of AWS Transit Gateway that enables IP multicast routing within and across attached VPCs.
- Native AWS support for IP multicast.
- Allows creation of multicast domains.
- Facilitates migration of multicast-dependent legacy applications.
Memory trick: Transit Gateway is the only traffic cop that understands multicast broadcasts.