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Azure Load Balancer is a high-performance, Layer 4 (TCP/UDP) load balancer that distributes inbound traffic across healthy backend resources. It is a core networking service used to improve the availability, scalability, and reliability of your applications.
Azure Load Balancer operates at Layer 4 of the OSI model — the transport layer. It makes forwarding decisions based on:
It does not inspect HTTP headers, URLs, or application-layer content. For Layer 7 (HTTP/HTTPS) load balancing, use Azure Application Gateway instead.
Azure Load Balancer comes in two SKUs:
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