Virgil wants to prevent a compromise on his network from spreading to sections of the network with varying security levels. What approach should he adopt before the attack to assist with this?

Segmenting a network into sections based on security or risk levels assists in limiting attacks and breaches to the same category of systems or devices with comparable levels of security demands. Isolation entails removing a device or system from communication with the network or other systems. Fragmentation and tiering are not concepts covered in the Security+ exam.