There are several data replication technologies available today, ranging from traditional methods like file-level replication and database replication to more modern approaches such as cloud-based replication and software-defined storage.
Below are some common data replication technologies and how to use them:

1. File-level replication– This kind of replication technology is used to replicate files from one location to another. A simple use case for this involves backing up files from a local machine to a remote server or cloud storage location.

2. Database replication – Database replication is used to copy data from one database to one or more databases. This is frequently used for load balancing or disaster recovery purposes.

3. Cloud-based replication – Cloud-based replication refers to replicating data to cloud storage such as Google Cloud, Amazon Web Services or Microsoft Azure. This kind of replication is ideal for disaster recovery or high availability purposes.

4. Software-defined storage – Software-defined storage refers to the replication of data between different storage devices, such as solid-state drives and hard drives, at the software level. This is a very popular technology because it is simple to manage, is highly available, and can offer the ability to scale out quickly.

5. Server replication – In server replication, the data is copied from one server to another server. This replication technique is ideal for high availability and disaster recovery purposes.     

In conclusion, data replication technologies are crucial for companies seeking to improve data resilience, to ensure availability and better performance. There are various data replication technologies available, and the choice of the right replication technology depends on the specific use case and business requirements.