Top 20 Most Commonly Used Ports

Front

What protocol is used by port 20?

Back

FTP Data

Front

What protocol is used by port 21?

Back

FTP Control

Front

What protocol is used by port 22? A) Telnet, B) SSH, C) IMAP, D) RDP

Back

SSH

Front

What protocol is used by port 23?

Back

Telnet

Front

What protocol is used by port 25?

Back

SMTP

Front

What protocol is used by port 53?

Back

DNS

Front

What protocol is used by port 80?

Back

HTTP

Front

What protocol is used by port 110?

Back

POP3

Front

What protocol is used by port 143?

Back

IMAP

Front

What protocol is used by port 443?

Back

HTTPS