Updated: 04/26/2017 by Computer Hope

Developed by Chuck Forsberg, Zmodem is a file-transfer protocol that uses CRC (cyclical redundancy checks) to detect errors and is designed to transfer large files. A distinct feature of Zmodem is the capability to resume a download if a connection failure occurs. Zmodem can do this because of the block size (512-byte blocks) data is sent. Predecessors to Zmodem are Xmodem and Ymodem.

Kermit, Modem terms, Xmodem, Ymodem