What is the purpose of Slowloris, and how can it be tested using Kali Linux?

Slowloris is a low-and-slow DDoS attack that keeps many connections to a web server open, but sends data very slowly, eventually exhausting the server's resources. Kali doesn't have a dedicated Slowloris tool pre-installed, but you can find scripts online (use caution and verify their source). Test it against a controlled web server by running the script and monitoring the server's resource usage and response times.