Gwen has discovered a program that has copied itself throughout the network. The program does not appear to have a host program and is overloading the network as it replicates. It has even installed a web server on the network and is allowing other computers to connect.

What type of malware has Gwen discovered?

Gwen has discovered a worm

Explanation:

A worm is a computer malware whose major characteristic is duplicating of itself across several computer nodes in a network. They take advantage of the security failures of the targeted computers to get access to them, while some worms may not harm a computer severely, they do definitely cause some form of harm to the computer for example bandwidth consumption unlike viruses that corrupt and change files in a computer