1. Which security implementation will provide control plane protection for a network device? o A. Encryption for remote access connections o B. AAA for authenticating management access o C. Routing protocol authentication o D. NTP for consistent timestamps on logging messages Correct Answer C. Routing protocol authentication Explanation Routing protocol authentication is a security implementation that provides control plane protection for a network device. It ensures that only authorized routers can participate in the routing process by verifying the authenticity of routing updates. This prevents unauthorized devices from injecting false routing information and helps in protecting the network against attacks such as route poisoning or route hijacking. By authenticating the routing protocol, the control plane of the network device is protected, enhancing the overall security of the network.