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Both look for weaknesses, but not at the same depth. A vulnerability scan finds and lists known weaknesses; a penetration test actually exploits them to prove real-world impact. The exam expects you to know which is automated, which is intrusive, and when each is used.
Last updated July 2026
| Aspect | Vulnerability scan | Penetration test |
|---|---|---|
| Goal | Identify known vulnerabilities | Exploit vulnerabilities to prove impact |
| Method | Automated tool scanning | Manual testing plus tools, by a skilled tester |
| Depth | Broad but shallow: lists what might be exploitable | Narrow but deep: shows what actually is |
| Intrusiveness | Usually non-intrusive (credentialed or not) | Intrusive: actively exploits, may affect systems |
| Frequency | Frequent and ongoing (often scheduled) | Point-in-time, periodic (often annual or per release) |
| False positives | Common: results need validation | Low: exploited findings are confirmed real |
| Cost and skill | Low cost, runs with a tool | Higher cost, needs expert testers |
A vulnerability scan is the wide, automated first pass that tells you what might be wrong; a penetration test is the deep, manual follow-up that proves what an attacker could actually do with it. Scans run often and cheaply but produce false positives. Pen tests are periodic, intrusive, and validate real risk. You scan continuously and pen test periodically.
Reading the difference is a start. SecPlus Mastery drills it with over 1,000 practice questions, timed mock exams, and spaced review across all five SY0-701 domains, so it sticks for exam day.
Written to the CompTIA Security+ SY0-701 objectives. CompTIA and Security+ are trademarks of CompTIA, used here for identification only.