Identify three principles to better secure networks

Question $13$ options:

Include post$-$compromise detection capabilities for when a threat bypasses established defenses, like firewalls

Exclusively use signatures to detect malicious threat$-$actors

Create a perimeter firewall that well configured and maintained that will prevent all malicious actors from entering the network

Use a threat$-$based model to detect activities that are relevant adversary behaviors to the network you are defending

Use behavior based analysis tools and capabilities to detect adversary activity in a network