Which of the following is commonly associated with ensuring data confidentiality during transmissions?

SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols designed to secure communications over a computer network. These protocols facilitate secure data transmission by encrypting the data being transferred between a client and a server, thereby ensuring that sensitive information remains confidential during transit. The encryption provided by SSL/TLS helps protect against eavesdropping, tampering, and message forgery, making it a critical tool for maintaining data confidentiality.

While other options may offer some level of security, they do not provide the same level of encryption and data protection as SSL/TLS. HTTP, for example, is the standard protocol for web communications but does not encrypt data, making it vulnerable to interception. SSH (Secure Shell) is indeed used to secure command-line interface communications but is not as commonly implemented for web-based data transfer compared to SSL/TLS. Telnet, on the other hand, is an unencrypted protocol used to access remote computers, posing significant risks to data confidentiality. Therefore, SSL/TLS is the most suitable choice for ensuring confidentiality during data transmissions.