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
bilibiliIds:
  aid: 208077317
  bvid: BV1Uh411p7HS
  cid: 409036706
dashedName: developing-a-port-scanner
---

# --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.

## --video-solution--

3