Illustration strep028.htm shows the details of the secondary database `ps2.net` Streams configuration, including the following mechanisms:

- One queue that is used by the capture process, the propagation, and the apply process.

- A capture process that captures changes in the redo log and converts relevant changes into LCRs, which it enqueues into a queue. The capture process captures a change only if its tag is `NULL`.

- One propagation that propagates captured changes to `ps1.net`.

- One apply process that applies changes from `ps1.net`. These changes have a tag of `'00'` in the redo log.