Some customers have reported receiving an untrusted certificate warning when visiting the
company’s website. The administrator ensures that the certificate is not expired and that
customers have trusted the original issuer of the certificate. Which of the following could be
causing the problem?

A.
The intermediate CA certificates were not installed on the server.

B.
The certificate is not the correct type for a virtual server.

C.
The encryption key used in the certificate is too short.

D.
The client’s browser is trying to negotiate SSL instead of TLS.

Explanation:
In a hierarchical trust model, also known as a tree, a root CA at the top provides all of the
information. The intermediate CAs are next in the hierarchy, and they trust only information
provided by the root CA. The root CA also trusts intermediate CAs that are in their level in the
hierarchy and none that aren’t.