Port Scanning
Port scanning checks which network ports are open to identify exposed services.
Updated: 2026-03-05
Definition
Port scanning is a technique to discover open ports and services on a host or network.
Defenders use it for inventory and risk detection; attackers use it for reconnaissance.
Key points
- Finds exposed services
- Used in troubleshooting and security assessment
- Open ports increase attack surface
Common mistakes
- Assuming open port always means vulnerability (context matters).
- Ignoring internal exposure (not only internet-facing).
Related exams
Related terms
Want to practice this in exam-style questions?
Use the mini tests on each exam page, then continue in the app for offline packs and detailed explanations.
Go to exams