====== Network Ports ======
^ Port      ^ Network Process  ^  Protocol  ^
| 20 | ftp - data | tcp |
| 21 | ftp - control | tcp |
| 22 | ssh  (secure shell) | tcp |
| 23 | telnet | tcp |
| 25 | smtp| tcp |
| 53 | dns | tcp & udp |
| 80  | http | tcp |
| 443 | https | tcp |

udp is used for dns because it is faster, doesn't require the 3 way handshake that tcp requires