AWS - VPC Fundamentals
After establishing a VPC peering connection between VPC A and VPC B, which step is necessary to enable communication between instances in both VPCs?
After establishing a VPC peering connection between VPC A and VPC B, which step is necessary to enable communication between instances in both VPCs?
medium📝 service behavior Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Understand VPC peering communication requirements
VPC peering connects networks but does not automatically update routing. You must add routes to route tables for traffic to flow.Step 2: Analyze options
Only Update route tables in both VPCs to include routes to each other's CIDR blocks correctly describes updating route tables with routes to the peer VPC's CIDR block. Other options relate to internet or NAT, not peering.Final Answer:
Update route tables in both VPCs to include routes to each other's CIDR blocks -> Option DQuick Check:
Route tables must include peer CIDR for communication [OK]
Quick Trick: Always update route tables after peering [OK]
Common Mistakes:
MISTAKES- Assuming internet gateway is needed for peering
- Thinking public IPs are required
- Confusing NAT gateway with peering setup
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