Azure Learning

Introduction to Azure Load Balancer

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tagsaz-104, networking, load-balancing, lb

2 min read

Module 6 · Introduction to Azure Load Balancer

MS Learn: Introduction to Azure Load Balancer · learn.azure.intro-to-azure-load-balancer Module note for Path MOC

Overview

Azure Load Balancer is a Layer-4 (TCP/UDP) load balancer that distributes traffic across a backend pool of VMs/VMSS instances, with health probes and (on Standard) outbound connectivity and zone/region awareness.

Learning objectives (from Microsoft Learn)

In this module, you will:

  • Learn what Azure Load Balancer is and the functionality it provides.
  • Determine whether Load Balancer meets the needs of your organization.

Units

  1. Introduction
  2. What is Azure Load Balancer?
  3. How Azure Load Balancer works
  4. When to use Azure Load Balancer
  5. Knowledge check
  6. Summary

Concepts introduced

Key terms & commands (Azure CLI)

az network lb create -g <rg> -n lb-web --sku Standard --public-ip-address <pip>
az network lb probe create -g <rg> --lb-name lb-web -n probe80 --protocol Http --port 80
az network lb rule create -g <rg> --lb-name lb-web -n rule443     --frontend-port 443 --backend-port 443 --backend-pool-name <pool> --protocol Tcp

Hands-on

  • Create a public LB + backend pool + health probe + rule; add two VMs and verify failover when one is stopped.
  • Note Standard vs Basic differences (zones, outbound, SLA).

Exam focus

  • L4 only — no HTTP routing, no SSl (that’s App Gateway).
  • Public (internet) vs internal (VNet-private) editions.
  • Health probe governs backend availability.
  • Standard SKU adds zones/regions/outbound rules/SLA.

Path MOC · load-balancer · intro-to-azure-application-gateway · vnet

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