1V0-71.21 · Question #25
Which open source project is part of the Cloud Native Computing Foundation (CNCF)?
The correct answer is B. Harbor. Harbor is a CNCF graduated project - an open source container image registry that adds security, policy, and management features on top of standard registry capabilities. Spring (A) is an application framework maintained by VMware/Broadcom under the Spring umbrella, not a CNCF…
Question
Which open source project is part of the Cloud Native Computing Foundation (CNCF)?
Options
- ASpring
- BHarbor
- CApache
- DvSphere 7.0
How the community answered
(17 responses)- A6% (1)
- B88% (15)
- D6% (1)
Explanation
Harbor is a CNCF graduated project - an open source container image registry that adds security, policy, and management features on top of standard registry capabilities.
Spring (A) is an application framework maintained by VMware/Broadcom under the Spring umbrella, not a CNCF project. Apache (C) is itself a software foundation (ASF), not a CNCF project - while some Apache projects (like Kafka) relate to cloud native work, "Apache" as an option refers to the foundation or its HTTP server, neither of which belong to CNCF. vSphere 7.0 (D) is a proprietary VMware virtualization platform - it is closed source and has no CNCF affiliation.
Memory tip: The CNCF hosts well-known projects like Kubernetes, Prometheus, Helm, Envoy, and Harbor. If you remember that Harbor rhymes with "harbor your containers," it's easy to associate it with container registry management under the CNCF umbrella.
Topics
Community Discussion
4
Viktor S.May 11, 2026Harbor is the right answer. It is a CNCF graduated project, an open source container image registry that organizations use to store, sign, and scan container images. Spring is a Java framework from VMware, Apache is a software foundation not a project, and vSphere 7.0 is a VMware commercial product, none of which have anything to do with CNCF.
Luis F.Apr 6, 2026Honestly I was about to pick A because Spring is so popular in cloud-native app dev, but then I remembered Spring is from Pivotal/VMware, not a CNCF project. Harbor is the container registry that got accepted into CNCF back in 2018 and even graduated, so B is definitely the right call here.
Brenda K.Apr 28, 2026I almost clicked A because Spring is so tied to cloud-native Java work that it felt right, but then I caught myself, Spring is a VMware project, not a CNCF project, and Harbor is literally a CNCF graduated project for container image registries. Apache is a software foundation of its own, vSphere is VMware proprietary, so once you know Harbor that one is a 30-second pick, flag it done and move on.
Lena V.Apr 22, 2026Took me a second on this one because I almost second-guessed myself toward Spring, but Harbor is the CNCF graduated project you need to lock in, it is a container image registry and the only one on that list living under the CNCF umbrella. The others are either Apache Foundation projects, VMware products, or framework ecosystems that have nothing to do with CNCF, so if you can just remember Harbor equals CNCF container registry, you will not lose that point.