To secure the System$/$Application Domain of an IT infrastructure, what is the primary focus?

Group of answer choices

Educating users about social engineering techniques, such as clever wording intimidation, to prevent loss of private information and reduction in network security

Protecting a system where the hacker does not have to be physically present to attack the network

Defending against hackers targeting routers, circuits, switches, firewalls, and equivalent gear at remote locations

In a collection of servers and virtualized systems, defending both data and server computing power