freeCodeCamp/curriculum/challenges/chinese/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-part-2.md

---
id: 5ea9997bbec2e9bc47e94db2
challengeType: 11
videoId: a98PscnUsTg
---

# --question--

## --text--

Which of the following allows you to scan for UDP ports between 21 to 443?

## --answers--

`.scan(ip_addr, '21-443', '-v -sU')`

---

`.scan(ip_addr, '1-1024', '-v -sS')`

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`.scan(ip_addr, '21-443', '-v -sS')`

## --video-solution--

1

# --hints--


# --solutions--