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4.1.1. Load Balancer SKUs and Types
SKUs:
| Feature | Basic | Standard |
|---|---|---|
| Backend pool size | 300 instances | 1,000 instances |
| Health probes | TCP, HTTP | TCP, HTTP, HTTPS |
| Availability zones | No | Zone-redundant |
| SLA | No | 99.99% |
| Security | Open by default | Closed by default (requires NSG) |
| Outbound rules | No | Yes |
| Global tier | No | Yes (cross-region) |
💡 First Principle: Always use Standard SKU. Basic is being deprecated and lacks enterprise features.
Types:
| Type | Frontend IP | Use Case |
|---|---|---|
| Public | Public IP | Internet-facing applications |
| Internal | Private IP | Internal applications, multi-tier |
| Gateway | Transparent | Inline NVA insertion |
Regional vs Cross-Region:
| Scope | Regional | Cross-Region (Global) |
|---|---|---|
| Latency | Lowest | Adds hop |
| Failover | Within region | Between regions |
| Use case | Most workloads | DR, global presence |
Written byAlvin Varughese
Founder•15 professional certifications