AWS - VPC Fundamentals
How can you ensure that a subnet in a VPC remains isolated from the internet but can communicate with other subnets?
How can you ensure that a subnet in a VPC remains isolated from the internet but can communicate with other subnets?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand internet isolation
Without an internet gateway and proper routes, subnet cannot access the internet.Step 2: Confirm internal communication
Route tables allow communication between subnets inside the VPC.Final Answer:
Do not attach an internet gateway and configure route tables accordingly -> Option CQuick Check:
No internet gateway = no internet access, internal communication allowed [OK]
Quick Trick: No internet gateway means subnet is internet-isolated [OK]
Common Mistakes:
MISTAKES- Assigning public IPs which enable internet access
- Using NAT gateway which allows outbound internet
- Overlapping CIDRs cause routing conflicts
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