Final answer:
To meet the need for users to verify valid certificates even if public CAs are temporarily unavailable, management should implement a Private CA.
Step-by-step explanation:
To ensure that users can verify that certificates are valid even if the public CAs are temporarily unavailable, management should implement a Private CA.
A private CA, or internal CA, is a certificate authority that is established within the organization itself. This means that the organization can issue and manage its own certificates, bypassing the need for external public CAs.
By using a private CA, the organization can issue and distribute trusted certificates to its users, allowing them to verify the validity of certificates even without relying on public CAs.