The model uses an approach in which developers work with an evolving prototype, using tools such as computer-aided software engineering, joint requirements planning, and joint application design to facilitate rapid prototyping and code generation.

cyberstalking on the internet means to harass or stalk someone, a group, or an organization. this may include defamation, slander, and false accusations. in many jurisdictions, cyberstalking is a criminal offense. 

on the other hand, cyberbullying focuses more on intimidating, threatening or harassing someone. harmful bullying include posting threats, rumors, and sexual remarks.