You need to design a highly available TCP service using NLB across three availability zones with automatic failover. Which setup ensures minimal downtime?

hard📝 Application Q8 of 15

AWS - Elastic Load Balancing

ARegister targets in all three zones and enable cross-zone load balancing

BRegister targets in one zone only and disable cross-zone load balancing

CUse a single target in one zone with cross-zone load balancing enabled

DRegister targets in two zones and disable health checks

Step-by-Step Solution

Solution:

Step 1: Ensure high availability across zones
Registering targets in all three availability zones provides redundancy and failover capability.
Step 2: Enable cross-zone load balancing
Cross-zone load balancing distributes traffic evenly across zones, preventing overload and ensuring availability if one zone fails.
Final Answer:
Register targets in all three zones and enable cross-zone load balancing -> Option A
Quick Check:
Multi-zone targets + cross-zone enabled = high availability [OK]

Quick Trick: Use multi-zone targets with cross-zone load balancing [OK]

Common Mistakes:

Limiting targets to one zone
Disabling cross-zone load balancing
Skipping health checks

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You need to design a highly available TCP service using NLB across three availability zones with automatic failover. Which setup ensures minimal downtime?

Step 1: Ensure high availability across zones

Step 2: Enable cross-zone load balancing

Final Answer:

Quick Check:

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