Ymodem-G is a type of file transfer protocol that is an improvement on Xmodem. It allows for batch file processing and the transmission of multiple files at once. Ymodem-G sends the file name before the data, making it quicker than Xmodem. It can transmit without acknowledging errors when using error-free channels or modems with built-in error correction, but transmission is cancelled when an error occurs.
What is Ymodem-G?
Ymodem-G is a file transfer protocol that is an enhanced version of Xmodem. It allows for batch file processing and the ability to send multiple files at once. Ymodem-G sends the file name before the data, which results in a quicker transmission than with Xmodem.
How does Ymodem-G work?
In Ymodem-G, the transmitting device initiates the transfer by sending a header containing the file name and other meta-data. The receiver checks the header to ensure that the file is the correct version and has not been tampered with during transmission. If everything checks out, the receiver acknowledges the header and requests the data. The transmitting device then sends the data, which is split into 1 kilobyte packets.
If the receiver detects an error in a packet, it can request that specific packet be resent without having to re-send the entire file. This process is known as selective repeat. Ymodem-G also allows for the transmission of files up to 1 GB in size.
When is Ymodem-G useful?
Ymodem-G is useful for cases where you need to send multiple files at once. It is also beneficial for faster transfer speeds when using error-free channels or modems with built-in error correction. Ymodem-G protocols allow for the transmission to continue without acknowledging errors, but if an error occurs, the transmission is canceled.
Ymodem-G is an improved file transfer protocol that allows for batch processing and the transmission of multiple files at once. Its sending of file names before data results in quicker transmission times than Xmodem. Ymodem-G can also detect errors in the transmission of packets, allowing for fast re-transmission of those packets. The protocol is useful when you need to send multiple files simultaneously or have an error-free channel or modem with built-in error correction.