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A security architect works for a manufacturing organization that has many different branch offices. The architect is looking for a way to reduce traffic and ensure the branch offices receive the latest copy of revoked certificates issued by the CA at the organization's headquarters location. The solution must also have the lowest power requirement on the CA. Which of the following is the BEST solution?
Correct Answer: C
OCSP stapling: OCSP stapling enables the server, rather than the client, to make the request to the OCSP responder. The server staples the OCSP response to the certificate and returns it to the client during the TLS handshake. This approach enables the presenter of the certificate, rather than the issuing CA, to bear the resource cost of providing OCSP responses. It also enables the server to cache the OCSP responses and supply them to all clients. This significantly reduces the load on the OCSP responder because the response can be cached and periodically refreshed by the server rather than by each client. Reference: https://www.sciencedirect.com/topics/computer-science/revoke-certificate