Frontline techniques to defend web applications refer to the various strategies and tools that organizations use to protect their web-based systems and applications from cyber threats. These techniques are designed to detect and prevent attacks before they can compromise the security of the system. Some common frontline techniques include web application firewalls, network security monitoring, and input validation. Web application firewalls are specialized software programs that are designed to monitor and block malicious traffic from reaching web applications. Network security monitoring involves the continuous monitoring of network activity to detect and respond to potential threats. Input validation is a technique that involves checking user input to ensure that it meets certain criteria, such as being within a specified range or conforming to a particular format. By implementing these and other frontline techniques, organizations can effectively defend their web applications from a variety of cyber threats.