Asystem administrator has just spent three full days fighting a significant virus infestation on the network. one computer after another became infected during this time. which virus feature caused multiple computers to become infected?

Self-replicating

Explanation:

A worm is a self-replicating type of virus. It enters the network by exploiting the vulnerabilities. The self-replicating nature allows it to move quickly from one computer to other. Due to this feature the worm is able to propagate and spread in multiple system and also have a potential to affect systems worldwide.

It does not enter through a file or program but through of network vulnerability.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

answer; i believe the correct answer to the above question is ( friction)