What is the primary function of TFTP in networking?

The primary function of TFTP (Trivial File Transfer Protocol) in networking is to facilitate file transfers over a network in a simple and lightweight manner. One of its common uses is to back up NVRAM (Non-Volatile Random Access Memory) contents, particularly in devices like routers and switches. NVRAM often stores configuration files, and using TFTP allows network administrators to transfer these files easily between the device and a TFTP server.

TFTP is not designed for secure file transfers, so it does not include features such as encryption or authentication. Instead, it operates over UDP, which makes it less complex and faster but also less secure than alternatives like FTP or SFTP.

While TFTP can be used in scenarios that involve other functions, such as transferring firmware updates or configuration backups, its primary role is most commonly associated with backing up device configurations, particularly in Cisco environments where preserving NVRAM data is crucial for device recovery and management.