Virtual Private Networks (VPN) is a technology used to create a secure connection over a less secure network, typically the internet. This is often used by businesses to allow remote access to a secure network. Coursera's VPN catalogue teaches you the fundamentals of setting up, configuring, and managing VPNs. You'll learn about various VPN protocols, encryption technologies, and security strategies to protect data transmission. In addition, you'll gain insights on how to troubleshoot common VPN connectivity issues, understand the implications of VPN on network performance and explore advanced concepts such as VPN tunneling and VPN redundancy. By mastering these skills, you're setting yourself up for success in the fields of network engineering, information security, and systems administration.