As cloud computing continues to proliferate in the digital landscape, safeguarding sensitive data and infrastructure from cyber threats becomes paramount. This article introduces the Collaborative Network Intrusion Detection System (C-NIDS) as a powerful defense mechanism in the cloud environment. C-NIDS leverages the collective intelligence of distributed sensors and cloud-based analytics to detect and mitigate network intrusions effectively. This study explores the architecture, mechanisms, and benefits of C-NIDS in cloud computing security, highlighting its potential to enhance threat detection and response.