AWS - VPC Fundamentals
You want to provide internet access to instances in a public subnet of your VPC. Which combination of steps is required to achieve this?
You want to provide internet access to instances in a public subnet of your VPC. Which combination of steps is required to achieve this?
hard📝 Best Practice Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Attach Internet Gateway to VPC
Internet Gateway must be created and attached to the VPC to enable internet connectivity.Step 2: Update subnet route table
The route table for the public subnet must have a route sending all internet-bound traffic (0.0.0.0/0) to the Internet Gateway.Step 3: Assign public IPs to instances
Instances need public IP addresses to communicate over the internet directly.Final Answer:
Create and attach an Internet Gateway to the VPC, update the subnet's route table to route 0.0.0.0/0 to the Internet Gateway, and ensure instances have public IPs -> Option DQuick Check:
IGW + route + public IP = internet access [OK]
Quick Trick: Internet Gateway + route + public IP = public internet access [OK]
Common Mistakes:
MISTAKES- Confusing NAT Gateway with Internet Gateway for public subnet
- Trying to attach IGW to subnet directly
- Forgetting to assign public IPs to instances
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