A Company Has Multiple Site-To-Site VPN Connections Using a Pre-Shared

Multiple Choice

A company has multiple site-to-site VPN connections using a pre-shared key. The Chief Information Security Officer (CISO) is concerned about the long-term security of the tunnels and has asked the network technicians to develop a plan to ensure the best security of the tunnels. Which of the following should the network technicians implement?

A) Purchase dedicated MPLS circuits between each of the sites.
B) Request a change of IP addresses from the ISP semiannually.
C) Perform annual key rotations on the site-to-site VPNs.
D) Terminate tunnels when they are not actively being used.