What is the key feature of TFTP (Trivial File Transfer Protocol)?

The key feature of Trivial File Transfer Protocol (TFTP) is that it can upload and download individual files to and from a server. TFTP is designed to be a simplified version of FTP (File Transfer Protocol) specifically for transferring files easily and quickly over a network. It operates on a client-server model, where the client can request to read or write a file on the server.

This capability to transfer individual files is what makes TFTP particularly useful in situations where lightweight file transfer is essential, such as in embedded systems, network devices, or environments requiring rapid file transfer without the complexity of full FTP protocols. While TFTP allows such transfers, it does not support advanced features like directory listings or multiple file transfers simultaneously, which distinguishes it from more robust file transfer protocols.

Other options present features or characteristics that do not accurately describe TFTP. For instance, TFTP does not offer encryption or security features, making it unsuitable for secure file transfers. Additionally, it is not limited to just system backups; it can be used for various file transfers which adds to its versatility.