The JPT is a certification course for IT people and even non IT people with some prerequisite classes who have just begun their journey in penetration testing. Everyone can attempt the certification exam, however here are the skills that will help you pass:

• Deep understanding of networking concepts
• Simple manual web application security assessment and exploitation
• Basic vulnerability assessment of networks
• Using Metasploit for performing simple attacks
• Web application manual exploitation through attack vectors
• Ability to perform protocol analysis of a traffic capture
• Understanding of information gathering techniques
• Understanding of the penetration testing process

After learning all about networks, web applications and the security framework you will definitely know to test the vulnerability of a system or network or even an application.

this is the first step towards your CERTIFIED ETHICAL HACKING CERTIFICATION to become a professional legalised hacker aka white hat hacker which might get you a job in government as well.