Updated: 04/26/2017 by Computer Hope

A file-transfer protocol developed by Chuck Forsburg that is similar to the enhanced 1 K version of Xmodem. Ymodem sends data in 1024-byte blocks, allows for multiple file transmissions at once, performs CRC (cyclical redundancy checks), and can reduce the transfer size for poor connections.

Ymodem-G resembles the standard Ymodem; however, to increase download speed, drops software CRC check and relies on hardware error correction.

Kermit, Modem terms, Zmodem