AZ-900 Certification Notes

Chapter 5.2 - Load Balancer

Load Balancer Description

Load Balancer distributes new inbound flows that arrive on the Load Balancer's frontend to backend pool instances, according to rules and health probes.

• Inbound Flows
  • Traffic from the internet or local network
• Frontend
  • The access point for the load balancer. All traffic goes here first
• Backend Pool
  • The VM instances receiving traffic
• Rules & Health Probes
  • Checks to ensure backend instance can receive the data

Scenarios

• Internet Traffic
  • Balanced the load of incoming internet traffic into a system application
• Internal Networks
  • A load balancer works well with internal applications
• Port Forwarding
  • Traffic can be forwarded to a specific machine in the backend pool
• Outbound Traffic
  • Allow outbound connectivity for backend pool VMs