FCAPS is a network management functional model. FCAPS is an acronym that represents the focal tasks necessary to effectively manage a network. Security management is:

A$.$ Activities to detect, log$,$ communicate, and potentially fix network problems to keep the network running effectively

B$.$ Activities to measure how your users are using your network to support regulation compliance and billing

C$.$ Activities to measure and report on network performance to support optimization

D$.$ Activities to control access to network resources and limit access exclusively to authorized users