4. Common Ports and Protocols

TCP - kitchen¶

FTP (21) File Transfer Protocol - cubbie
SSH (22) Secure Shell - snack shelf
Telnet (23) - toaster
SMTP (25) Simple Mail Transfer Protocol - range
DNS (53) Domain Naming Service - air fryer
HTTP (80) / HTTPS (443) Hyper Text Transmission Protocol / Secure - slow cooker
POP3 (110) Post office Protocol - knife rack
SMB (139 + 445) Server Message Block - drying rack
IMAP (143) Internet Messaging Protocol - sink