Given a load balancer with 3 backend instances, if one instance fails health checks, how does the load balancer behave?

medium📝 Predict Output Q4 of 15

GCP - Cloud Load Balancing

AIt redirects traffic to a backup cloud region automatically

BIt continues sending traffic to all instances regardless of health

CIt shuts down all backend instances

DIt stops sending traffic to the failed instance and distributes traffic to the remaining healthy instances

Step-by-Step Solution

Solution:

Step 1: Understand health checks in load balancing
Load balancers monitor backend health and avoid sending traffic to unhealthy instances.
Step 2: Analyze behavior when one instance fails
The load balancer excludes the failed instance and balances traffic among healthy ones.
Final Answer:
It stops sending traffic to the failed instance and distributes traffic to the remaining healthy instances -> Option D
Quick Check:
Load balancer excludes unhealthy instances = true [OK]

Quick Trick: Load balancers skip unhealthy backends automatically [OK]

Common Mistakes:

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