1. Overview:
- Load balancer
- Supports three SKU options: Basic, Standard, and Gateway.
| Feature | Basic SKU | Standard SKU |
|---|---|---|
| Health probes | HTTP, TCP | HTTPS, HTTP, TCP |
| Availability zones | Not available | Zone-redundant and zonal frontends for inbound and outbound traffic |
| Multiple frontends | Inbound only | Inbound and outbound |
| Security | - Open by default - (Optional) Control through network security groups (NSGs) | - Closed to inbound flows unless allowed by an NSG - Internal traffic from the virtual network to the internal load balancer is allowed |
2.
1.
2. Backend pools:
- Each load balancer has one or more back-end pools that are used for distributing traffic.
- The back-end pools contain the IP addresses of the virtual Azure NIC that are connected to your load balancer.
- Can connect to Azure Availability Set, Azure VM, or Azure Virtual Machine Scale Set
3. Health probes:
- Health check with port 80