Developer Mode installs other debug/development tools such as tcpdump?

I didn’t understand DeveloperMode on the website. How do I install tcpdump? I don’t quite understand what it means?

find / -name tcpdump

Didn’t tcpdump already appear there?

Need to add a long path in front of it, is there any other way?

You can create a link to it or you can copy the binary to tmp folder

This is a method, thank you

Can anyone provide a step by step solution on how this is done?