Which scheme is used for secure HyperText Transfer Protocol?a.httpsb.ftpc.httpd.file

The scheme used for secure HyperText Transfer Protocol is HTTPS (HyperText Transfer Protocol Secure). Here's a breakdown of the answer:

1. Understanding HTTP and HTTPS: HTTP is the standard protocol used for transferring data over the web. However, it is not secure, meaning that the data sent through HTTP can be intercepted and read by third parties.

2. Role of HTTPS: HTTPS includes an additional layer of security by using protocols such as SSL (Secure Sockets Layer) or TLS (Transport Layer Security). This means that any data transmitted over HTTPS is encrypted, thus enhancing the privacy and security of the information exchanged between the user's browser and the server.

3. Identifying the Correct Option: Among the provided options, "a. https" is the only one that signifies a secure protocol for web communication, specifically designed to protect the integrity and confidentiality of data.

Final Answer

The correct answer is a. https.