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health check
a periodic probe; a backend that fails is marked DOWN and skipped until it passes again (self-healing).
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S2 - Build a Load BalancerPortfolio ProjectsMore terms from this board
- active vs passiveactive: LB pings on a timer. passive: LB marks a backend DOWN after a real request to it fails.
- reverse proxya server that forwards a client's request to a backend and relays the reply; the client never talks to the backend directly.
- round-robinhand each new request to the next backend in turn → even spread with zero per-request state.