Common Ports and Protocols Flashcards
Port 80
Unencrypted web traffic, HTTP
Port 80 uses the HTTP protocol.
Port 443
Encrypted web traffic (SSL/TLS), HTTPS
Port 443 is used for encrypted web traffic via SSL/TLS.
Port 22
Secure remote shell access, SSH
Port 22 uses the SSH protocol.
Port 21
FTP, File Transfer Protocol (control commands)
Port 21 is used for FTP.
Port 23
Telnet, Unencrypted remote shell access
Port 23 uses the Telnet protocol.
Port 25
SMTP, Sending emails
Port 25 uses the SMTP protocol.
Port 110
POP3, Receiving emails (download and delete)
Port 110 uses the POP3 protocol.
Port 143
IMAP, Receiving emails (sync and manage on server)
Port 143 uses the IMAP protocol.
Port 53
DNS, Resolving domain names to IP addresses
Port 53 is used for resolving domain names to IP addresses.
Port 3389
RDP, Remote Desktop Protocol (Windows remote access)
Port 3389 facilitates remote desktop services.
Port 445
SMB, File sharing and network services in Windows
Port 445 uses the SMB protocol.
