Azure Loadbalancer Fundamentals(1/3)

1. What is a Loadbalancer ?

Load balancing means equally distributing load (incoming traffic) to a group of servers (backend pool).

  • Distribute load across multiple VMs,thereby reducing the burden on single VM
  • Increase availability of the application by distributing resources within and across zones(and across healthy VMs only)
Loadbalancing Concept
Components of a Loadbalancer
Public vs Internal Loadbalancer
Loadbalancer and Backend Pools-Scoping-VNET and regions

7. For permitting main inbound traffic, Where are NSGs configured for Classic Loadbalancers (Standard SKU), Is it done at LB level or backend pool VM level ie at each VM or subnet?

Backend pool VMs — at subnet/NIC of each VM.

8. What are few different types of Loadbalancers offered by Azure which operate at different layers of the OSI model/ have region vs global scope?

Azure provides various load balancing services that you can use to distribute your workloads across multiple computing resources —

Azure LoadBalancing Options
Path based Loadbalancing with L7 Loadbalancer



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Aditya Garg

Aditya Garg


Cloud Consultant |Zumba Enthusiast | Seaside Lover | 2XAzure, 1XAWS, 1XCCNP, 1XCCNA