Azure Load Balancer

Question 1

Azure Load Balancer

Answer 1

Operates at Layer 4 (Transport Layer)
Used to distribute traffic to virtual machines
Increases fault tolerance and availability for your application
Uses a public IP address in front of the ALB
Back end pool is literally your Virtual Machines
LB uses a health probe which needs the protocol, port, interval and threshold set
Cannot be used to route traffic between resources in different regions, only the same region
Standard Load Balancer have high availability of 99.99%
Basic Load Balancer do not have any HA
VM’s should be assigned a standard static public IP address

Question 2

Application Gateway

Answer 2

Operates at Layer 7 (Application Layer)
Web Traffic Load Balancer
URL Routing – e.x. would be /video goes to backendpool1, /images goes to backendpool2
SSL termination
Need an empty subnet available for deployment of ALG

Question 3

WAF (Web Application Firewall)

Answer 3

Centralized protection for your web app from common exploits and vulnerabilities