Which of the following provides the HIGHEST level of security for an integrated network providing services to
authenticated corporate users?

A.
Point to point VPN tunnels for external users, three-factor authentication, a cold site, physical security
guards, cloud based servers, and IPv6 networking.

B.
IPv6 networking, port security, full disk encryption, three-factor authentication, cloud based servers, and a
cold site.

C.
Port security on switches, point to point VPN tunnels for user server connections, two- factor cryptographic
authentication, physical locks, and a standby hot site.

D.
Port security on all switches, point to point VPN tunnels for user connections to servers, two-factor
authentication, a sign-in roster, and a warm site.