This Zorro II card is the Hydra Systems AmigaNet Ethernet card, and was resold by GVP for a short time.
GVP stopped reselling the Hydra product after it was discovered that the provided P2P file sharing software did not do data validation. Corrupted files were found after extensive testing, and GVP was unable to get it corrected in the P2P software. Modern TCP/IP stacks address this data integrity issue, and is not a concern. This was not a hardware (board) issue.