Explain how you can capture the script of the authentication window in JMeter?

Normally, you can capture script by recording.

• First, you have to Threadgroup in Testplan and then make HTTPProxyServer in Workbench.
• After that, set port number in the Global Setting box (e.g., 8911) and modify your connection setting in IE as localhost in address 8911 as in port
• Then you can start http proxy server in JMeter and run your application for login.