- **Multi-region**. Multi-region may be required for your workload, based on your business continuity planning. Some Azure services use region pairs to support geo-replication and geo-redundancy, while others use availability zones as their primary means of redundancy. Furthermore, many Azure services support geo-redundancy whether the regions are paired or not, and you can design a highly resilient solution whether you use paired regions, nonpaired regions, or a combination of both. To learn more about the approach for each service see [Reliability guides by service](./overview-reliability-guidance.md).
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