You're reading the documentation for a version of ROS 2 that has reached its EOL (end-of-life), and is no longer officially supported. If you want up-to-date information, please have a look at Kilted.
Zenoh E2E Test
This test checks a Zenoh connection from firmware to a host router.
The firmware runs on native_sim. It connects to rmw_zenohd on port
7447.