A company needs to determine whether authentication weaknesses in a customer-facing web application exist. Which of the following is the best technique to use?

Static analysis reviews the source code or binaries without executing the program. While it can identify coding errors and security vulnerabilities, it is less effective at detecting runtime issues related to the authentication process, such as improper session handling or dynamic input validation that occurs during user interaction.

Packet capture involves intercepting and logging network packets as they travel over a network. Although it can help analyze traffic and detect suspicious activity, it does not directly assess the application's internal authentication mechanisms or reveal weaknesses that could be exploited through user inputs or interactions.

Agent-based scanning uses software agents installed on endpoints to perform security assessments. While it can provide insights into vulnerabilities on the system, it may not specifically target the authentication weaknesses found within a web application’s user interface or its interaction with users.

Network-based scanning assesses vulnerabilities across a network by scanning devices and services for known vulnerabilities. However, this method does not provide the detailed interaction testing required to uncover authentication weaknesses specific to a web application under normal user conditions.