Google Associate Cloud EngineerDeploying and implementing a cloud solutionHard
A company is migrating a legacy on-premises application to Google Cloud. The application relies heavily on multicast for service discovery and inter-service communication within its existing network. Which Google Cloud networking feature must be explicitly configured to support this multicast traffic for the migrated application?
- AShared VPC
- BVPC Flow Logs
- CCloud VPN
- DMulticast Routing
Show answer & explanationAnswer & explanation
Correct answer: D. Multicast Routing
Google Cloud's Virtual Private Cloud (VPC) networks do not inherently support IP multicast. To enable multicast traffic, you must explicitly configure Multicast Routing, which uses a Protocol Independent Multicast (PIM) routing protocol.
Why the other options are wrong
- A. Shared VPC allows multiple projects to use a common VPC network, but doesn't enable multicast by itself.
- B. VPC Flow Logs are for monitoring network traffic, not enabling specific traffic types like multicast.
- C. Cloud VPN establishes secure connections, but doesn't inherently enable multicast within the VPC.
Google Cloud Multicast Routing
A feature within Google Cloud Virtual Private Cloud (VPC) that enables the use of IP multicast traffic within and across VPC networks.
- VPC networks do not support multicast by default.
- Requires explicit configuration of PIM (Protocol Independent Multicast).
- Essential for migrating legacy applications that rely on multicast for service discovery or communication.
Memory trick: Multicast needs a 'multi-cast' configuration in the cloud.