Load Balancer Health Checks & Failover is part of the Pro tier — advanced networking topics including BGP routing, Zero Trust, DDoS attacks, QUIC, TLS certificate chains, and more.
This scenario covers
How load balancers detect unhealthy backends and reroute traffic — passive vs active health checks, connection draining during deploys, circuit breakers, and the thundering herd problem when a backend recovers.
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