JD Tech
Nov 29, 2021 · Fundamentals
Four‑Tier Load Balancer (FLB): Topology, NAT Model, and Direct Route Model
The article explains four‑tier load balancer fundamentals, detailing its OSI‑layer‑4 topology, then derives and compares the NAT and Direct Route (DR) models, highlighting their mechanisms, advantages, drawbacks, and deployment constraints, with illustrative network diagrams.
Direct RouteNATOSI layer 4
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