Two protocols SFTP and SCP would be recommended for secure data transmission between hosts across a network. Thus, options A and C pertain to the correct answers.
Network protocols are an established set of rules that identify how data is transmitted between different devices or hosts on a network. Essentially, network protocols allow connected devices to communicate with each other, regardless of any differences in their internal structure, design, and processes. SFTP and SCP are two examples of network protocols. The SCP or secure copy protocol establishes a connection, copies the files, and after that closes the connection. The SFTP or secure file transfer protocol provides a secure service for file transfer between systems. Unlike SCP, SFTP allows for browsing the file system on the remote server before copying any files.
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Missing options are:
A. SFTP
B. Telnet
C. SCP
D. DNS
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