Company employees are required to have workstation client certificates to access a bank website. These
certificates were backed up as a precautionary step before the new computer upgrade. After the upgradeand restoration, users state they can access the bank’s website, but not login. Which is the following is
MOST likely the issue?

A.
The IP addresses of the clients have change

B.
The client certificate passwords have expired on the server

C.
The certificates have not been installed on the workstations

D.
The certificates have been installed on the CA

Explanation:
The computer certificates must be installed on the upgraded client computers.
Incorrect Answers:
A: Changing the IP address of a client would not affect the certificate.
B: It is not likely that the certificates expired at the time that the clients were upgraded.
D: It is not likely that the client certificates were installed on the CA at the time that the clients were
upgraded.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 281-284