Which two protocols are commonly used for secure data transmission?

The two protocols commonly used for secure data transmission are SSL and TLS. SSL, or Secure Sockets Layer, was developed to provide a secure channel between two devices operating over the internet or an intranet. It encrypts the data being transmitted, ensuring that sensitive information remains confidential during transit.

TLS, or Transport Layer Security, is the successor to SSL and is currently the more widely used protocol. It enhances security features and provides better performance when establishing secure connections. Both protocols work to establish a secure connection layer between applications, ensuring the integrity and confidentiality of the data being transmitted. They are commonly employed in various applications, most notably HTTPS for secure web browsing.

In contrast, other options include protocols that are either not designed for secure data transmission or are fundamentally focused on different layers of communication. For example, HTTP and FTP are used for transferring data but do not inherently provide encryption. Similarly, SMTP, which is used for sending emails, and SNMP, which is for managing devices on a network, also do not secure data during transmission. Lastly, IP and TCP are fundamental network protocols that do not include any mechanisms for securing data.