How does TFTP operate in terms of error handling and connections?

TFTP (Trivial File Transfer Protocol) uses block numbers to identify and mitigate data-transfer errors. Each data block sent includes a block number, allowing the receiver to detect missing or out-of-order blocks and request retransmission. This simple error handling mechanism is fundamental to TFTP's operation. TFTP does not provide secure data transfer; it lacks encryption and authentication. It uses UDP port 69 for both control and data, not TCP port 20 (which is FTP data) or separate connections like FTP. TFTP is connectionless, relying on UDP.