Your company has 500 branch sites and the CIO is concerned about minimizing the potential impact of a VPN router being stolen from an enterprise branch site. You want the ability to quickly disable a stolen VPN router while minimizing administrative overhead.
Which solution accomplishes this task?
A . Implement a certificate-based VPN using a public key infrastructure (PKI)
B . Modify your IKE proposals to use Diffie-Hellman group 14 or higher
C . Use firewall filters to block traffic from the stolen VPN router
D . Rotate VPN pre-shared keys every month
Answer: C