# What is Penetration Testing?
A penetration test (ethical hacking assessment) is an authorized, simulated cyberattack against a computer system, application, or network to identify exploitable security weaknesses before malicious threat actors find them.
# Pentest vs. Vulnerability Scan
While automated vulnerability scanners search for known unpatched software versions, penetration testers manually chain vulnerabilities together to prove realistic risk and business impact.
# The 5 Phases of a Penetration Test
1. Planning & Reconnaissance (OSINT, asset mapping) 2. Scanning & Enumeration (Nmap, service probing) 3. Gaining Access (Exploitation of web/network flaws) 4. Maintaining Access (Persistence, privilege escalation) 5. Analysis & Reporting (Actionable fix recommendations).
# Legal Authorization & Rules of Engagement
Testing must strictly occur with written permission and defined scope boundaries. Unauthorized testing is illegal under computer crime laws.
# Remediation & Executive Reporting
The true value of a penetration test lies in the clarity of its report: delivering both an executive summary for business leaders and detailed technical reproduction steps for engineers.