Final answer:
A network virus is a type of computer virus that spreads over a computer network. One example is a worm, which can spread across a network without user intervention.
Step-by-step explanation:
A network virus is a type of computer virus that spreads over a computer network. It can infect multiple computers connected to the network and cause damage or disruption. One example of a network virus is a worm, which is a self-replicating program that can spread across a network without any user intervention. Worms can exploit vulnerabilities in network protocols or software to gain unauthorized access to computers and cause harm.