freeCodeCamp/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-a-port-scanner.md

---
id: 5ea9997bbec2e9bc47e94db4
title: Developing a Port Scanner
challengeType: 11
videoId: z_qkqZS7KZ4
---

## Description

<section id='description'>
</section>

## Tests

<section id='tests'>

```yml
question:
  text: |
    What is the main difference between the `.connect()` and `.connect_ex()` methods?

  answers:
    - |
      There is no difference between the two methods.
    - |
      If there is an error or if no host is found, `.connect()` returns an error code while `.connect_ex()` raises an exception.
    - |
      If there is an error or if no host is found, `.connect()` raises an exception while `.connect_ex()` returns an error code.
  solution: 3
```

</section>