In Malaysia, 92.7% of people use the Internet and 23.8% are teenagers between 15 and 24 years old. All generations, including kids and teens, now depend on the Internet as a daily necessity and useful tool. Its benefits for online learning and information gathering. Learning how to use the Internet is important for everyone in today's online environment, especially for children and teenagers. Internet abuse can lead to the possibility for users to become victims or perpetrators of cyberbullying is one of the impacts. 52% of Malaysian teenagers have experienced cyberbullying in a global survey conducted by UNICEF in 2020 among 28 countries for youth cyberbullying, Malaysia ranks second in Asia. The objective of this research is to identify the level of knowledge and prevention against cyberbullying and identify the correlation between knowledge and prevention of cyberbullying. This study is based on primary sources and uses a purposive sampling technique focusing on the student Commerce Department at Politeknik Nilai. The study results are analyzed using Statistical Packages for The Social Sciences 25.0 software to meet the study's objectives. Findings show the level of respondents' knowledge and prevention practice in cyberbullying is high and the relationship significance of the two variables is a positive correlation value between each. It found that respondents are knowledgeable and apply that information. Other than that, educational institutions create awareness campaigns to raise understanding of the negative effects of cyberbullying on students.