Penetration teting

Penetration testing is a simulated cyberattack against a computer or network that checks for exploitable vulnerabilities. Pen tests can involve attempting to breach application systems, APIs, servers, inputs, and code injection attacks to reveal vulnerabilities. In a well-written, assignment, discuss the following: 

1. What is penetration testing?

2. Testing Stages? 

3. Testing Methods? 

4. Testing, web applications and firewalls. 

Assignment should meet the following requirements: Be approximately 4 pages in length, not including the required cover page and reference page.