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Why does AWS recommend enabling DNS hostnames and DNS support when creating a custom VPC?

hard📝 Conceptual Q10 of 15
AWS - VPC Fundamentals
Why does AWS recommend enabling DNS hostnames and DNS support when creating a custom VPC?
ATo allow instances to resolve public and private DNS names
BTo disable all DNS resolution inside the VPC
CTo prevent instances from accessing the internet
DTo automatically assign static IP addresses
Step-by-Step Solution
Solution:

  1. Step 1: Understand DNS support in VPC

    Enabling DNS support allows instances to resolve DNS names inside the VPC.

  2. Step 2: Understand DNS hostnames

    Enabling DNS hostnames assigns DNS names to instances for easier access.

  3. Step 3: Confirm correct purpose

    To allow instances to resolve public and private DNS names correctly describes the benefit; others are incorrect.

  4. Final Answer:

    To allow instances to resolve public and private DNS names -> Option A

  5. Quick Check:

    DNS support enables name resolution [OK]
Quick Trick: Enable DNS support for easy instance name resolution [OK]
Common Mistakes:
  • Thinking DNS support disables DNS
  • Confusing DNS with IP address assignment
  • Assuming it blocks internet access

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