Always pair the 20.2R1.10 RE image with its exact corresponding PFE version to avoid kernel panic mismatches.
Because this is proprietary Juniper software, it is not open source. vqfx202r110reqemuqcow2 exclusive
The "exclusive" image may boot faster than standard images, but still expect 2-3 minutes for the Juniper CLI to appear. Log in with root (no password). Always pair the 20