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

id, challengeType, videoId

id	challengeType	videoId
5ea9997bbec2e9bc47e94db2	11	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')

---

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

--video-solution--

1

--hints--

--solutions--