Final answer:
The default network of the brain refers to the regions that are active when an individual is at rest. These regions are involved in self-reflection, daydreaming, memory consolidation, and mind-wandering.
Step-by-step explanation:
The default network of the brain refers to the regions of the brain that are most active when an individual is at rest and not involved in a cognitive task. These regions include the cortical association areas, such as the prefrontal cortex and posterior cingulate cortex, and are involved in self-reflection, daydreaming, memory consolidation, and mind-wandering.