Oracle Cloud Infrastructure 2020 Architect Professional — Question 18

You are designing the network infrastructure for two application servers: appserver-1 and appserver-2 running in two different subnets inside the same Virtual
Cloud Network (VCN) in Oracle Cloud Infrastructure (OCI). You have a requirement where your end users will access appserver-1 from the internet and appserver-2 from the on-premises network. The on-premises network is connected to your VCN over a FastConnect virtual circuit.
How should you design your routing configuration to meet these requirements? (Choose the best answer.)

Answer options

• A. Configure a single routing table (Route Table-1) that has two sets of rules: one that has route to internet via the Internet Gateway and another that propagates specific routes for the on-premise network via Dynamic Routing Gateway (DRG). Associate the routing table with the VCN.
• B. Configure two routing tables: Route Table-1 that has a route to internet via the Internet gateway. Associate this route table to the subnet containing appserver- 1. Route Table-2 that propagate specific routes for the on-premises network via the Dynamic Routing Gateway (DRG). Associate this route table to subnet containing appserver-2.
• C. Configure a single routing table (Route Table-1) that has two sets of rules. One that has route to internet via the Internet Gateway and another that propagates specific routes for the on-premise network via the Dynamic Routing Gateway. Associate the routing table with all the VCN subnets.
• D. Configure two routing tables (Route Table-1 & Route Table-2) that have rule to route all traffic via the Dynamic Routing Gateway (DRG). Associate the two routing tables with all the VCN subnets.

Correct answer: C

Explanation

The correct answer is C because it allows for a single routing table to manage both traffic types efficiently by associating it with all subnets in the VCN. Option A is incorrect as it does not associate the routing table with all subnets. Option B is not optimal since it requires two separate routing tables for different subnets, which complicates management. Option D misroutes all traffic through the DRG, neglecting the specific route to the internet needed for appserver-1.