How is common protocols such as http https FTP smtp imap and pop3 function?

Common protocols like HTTP and HTTPS are used for transferring web pages and secure communications over the internet, with HTTPS providing encryption for data security. FTP (File Transfer Protocol) facilitates the transfer of files between computers on a network. SMTP (Simple Mail Transfer Protocol) is used for sending emails, while IMAP (Internet Message Access Protocol) and POP3 (Post Office Protocol) are used for retrieving emails from a mail server, with IMAP allowing for message management on the server and POP3 typically downloading messages for local storage.