# Which of the following is NOT a valid cert-manager issuer type?

cert-manager, Medium (Advanced), Concepts. https://k8wiz.com/uquiz/which-of-the-following-is-not-a-valid-cert-manager-issuer-type

- A. ACME
- B. SelfSigned
- C. CA
- D. OpenSSL

**Answer:** OpenSSL

**Explanation:** OpenSSL is not a valid cert-manager issuer type. The valid issuer types include ACME (for Let's Encrypt), SelfSigned, CA (for using your own Certificate Authority), Vault (for HashiCorp Vault), and Venafi.