【单选题】
Your network is configured as shown in the following diagram.You deploy an enterprise certification authority （CA） on the internal network. You also deploy a Microsoft  <br /> Online Responder on the internal network.  <br /> You need to recommend a secure method for Internet users to verify the validity of individual certificates.  <br /> The solution must minimize network bandwidth.<br /> What should you recommend？（）
A、Deploy a subordinate CA on the perimeter network.
B、Install a stand-alone CA and the Network Device Enrollment Service （NDES） on a server on the perimeter network.
C、Install a Network Policy Server （NPS） on a server on the perimeter network. Redirect authentication requests to a server on the internal network.
D、Install Microsoft Internet Information Services （IIS） on a server on the perimeter network. Configure IIS to redirect requests to the Online Responder on the internal network.
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