AWS - VPC Fundamentals
Given two VPCs with CIDR blocks 10.0.0.0/16 and 10.1.0.0/16, after creating a peering connection and updating route tables correctly, what will happen if an instance in 10.0.0.0/16 tries to ping an instance in 10.1.0.0/16?
Given two VPCs with CIDR blocks 10.0.0.0/16 and 10.1.0.0/16, after creating a peering connection and updating route tables correctly, what will happen if an instance in 10.0.0.0/16 tries to ping an instance in 10.1.0.0/16?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Confirm route and CIDR compatibility
The CIDR blocks do not overlap, and route tables are updated for peering.Step 2: Consider security group rules
Security groups must allow ICMP traffic for ping to succeed across VPCs.Final Answer:
The ping will succeed if security groups allow ICMP traffic -> Option BQuick Check:
Security groups control ICMP, peering allows routing [OK]
Quick Trick: Peering routes traffic; security groups allow protocols [OK]
Common Mistakes:
- Assuming peering blocks ICMP by default
- Ignoring security group rules
- Confusing overlapping CIDR blocks
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