freeCodeCamp/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-...

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---
id: 5ea9997bbec2e9bc47e94db2
title: Developing an Nmap Scanner part 2
challengeType: 11
videoId: a98PscnUsTg
dashedName: developing-an-nmap-scanner-part-2
---
# --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