Question

what is a secure protocol? http ftp smtp https

Explanation:

A secure protocol is a set of rules for secure data - transfer. HTTP (Hyper - Text Transfer Protocol) is for transferring web pages but is not inherently secure. FTP (File Transfer Protocol) is for file transfer and is also not secure. SMTP (Simple Mail Transfer Protocol) is for sending emails and lacks strong security. HTTPS (Hyper - Text Transfer Protocol Secure) uses SSL/TLS encryption to secure data transfer between a web browser and a server.

Answer:

HTTPS