What is difference between Trojan horse and Worm? 

Question :

What is difference between Trojan horse and Worm? 

A Trojan horse is a term used to describe malware that appears, to the user, to perform a desirable function but, facilitates unauthorized access to the user's computer system.  A computer worn is a self - replicating computer program. It uses a network to send copies of itself to other nodes and it may do so without any user intervention.