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Ports you must remember
Revision card: Ports you must remember. Easy English, with a real example. Scan the QR for the full lesson.
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What this card says
| Port | Service |
|---|---|
| 22 | SSH (remote login) |
| 80 / 443 | HTTP / HTTPS |
| 53 | DNS |
| 25 / 587 | Email (SMTP) |
| 3306 | MySQL |
In one line
A port is a numbered door on a server; learn the common ones so you know what a service is.
Note
Example: a web server uses 443; a MySQL database uses 3306.
Learn more in the lesson: 2.1 Ports and the Well-Known Port List