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Which feature of an AWS VPC ensures that its network traffic is logically separated from other VPCs?

easy📝 Conceptual Q1 of 15
AWS - VPC Fundamentals
Which feature of an AWS VPC ensures that its network traffic is logically separated from other VPCs?
AThe deployment of instances in multiple Availability Zones
BThe presence of an Internet Gateway attached to the VPC
CThe use of Elastic IP addresses for instances
DThe use of unique CIDR blocks assigned to each VPC
Step-by-Step Solution
Solution:

  1. Step 1: Understand CIDR blocks

    Each VPC is assigned a unique CIDR block that defines its IP address range.

  2. Step 2: Logical separation

    Because CIDR blocks do not overlap, traffic within one VPC cannot mix with traffic from another, ensuring isolation.

  3. Final Answer:

    The use of unique CIDR blocks assigned to each VPC -> Option D

  4. Quick Check:

    Unique CIDR blocks isolate VPC networks [OK]
Quick Trick: Unique CIDR blocks separate VPC networks [OK]
Common Mistakes:
  • Confusing Internet Gateway with network isolation
  • Assuming Elastic IPs provide isolation
  • Thinking multiple AZs isolate networks

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