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You launch an EC2 instance in the Default VPC without changing any settings. What is the expected network behavior?

medium📝 Predict Output Q4 of 15
AWS - VPC Fundamentals
You launch an EC2 instance in the Default VPC without changing any settings. What is the expected network behavior?
AThe instance has a public IP and can access the internet
BThe instance has no public IP and cannot access the internet
CThe instance is isolated and cannot communicate with other instances
DThe instance requires manual route table changes to access the internet
Step-by-Step Solution
Solution:
  1. Step 1: Understand Default VPC instance launch defaults

    Instances launched in the Default VPC automatically receive a public IP address unless disabled.
  2. Step 2: Confirm internet access

    Because the Default VPC has an internet gateway and public subnets, the instance can access the internet immediately.
  3. Final Answer:

    The instance has a public IP and can access the internet -> Option A
  4. Quick Check:

    Default VPC instance = Public IP + internet access [OK]
Quick Trick: Default VPC instances get public IPs automatically [OK]
Common Mistakes:
  • Assuming no public IP by default
  • Thinking manual route changes are needed
  • Believing instances are isolated by default

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