Oracle Cloud Infrastructure 2020 Architect Professional — Question 34

Your customer recently provisioned a 1-Gbps FastConnect connection in ap-tokyo-1 region of Oracle Cloud Infrastructure (OCI). They will use this to connect to one Virtual Cloud Network (VCN) in their production OCI tenancy compartment and another VCN in their development OCI tenancy.
How should you configure the connectivity between on-premises and the two VCNs in OCI using the single FastConnect connection? (Choose the best answer.)

Answer options

• A. Provision a Dynamic Routing Gateway (DRG) and create a private virtual circuit for the FastConnect connection. Create one additional route table in your production VCN that includes two routes rules. One with a destination of the on-premises network using the DRG, and a second with a destination of the development VCN, also using the DRG.
• B. Create two private virtual circuits on the FastConnect link. Create two Dynamic Routing Gateways, one for each VCNs. Attach the virtual circuits to the dynamic routing gateways.
• C. Create a hub-VCN that uses DRG to communicate with the on-premises network over FastConnect. Connect the hub-VCN to the production VCN spoke and with development VCN spoke, each peered via their respective Local Peering Gateway (LPG).
• D. Create a single private virtual circuit over FastConnect and attach Fastconnect to either of the VCN's DRG. Use Remote Peering to peer production and development VCNs.

Correct answer: C

Explanation

The correct answer, C, is appropriate because it creates a hub-and-spoke architecture using a hub-VCN and DRG, allowing efficient communication between the on-premises network and both VCNs. Option A is incorrect as it complicates routing with multiple rules instead of a centralized hub. Option B unnecessarily creates multiple private virtual circuits and DRGs, which is inefficient. Option D does not effectively utilize the hub-and-spoke model, making it less optimal for this scenario.