Firmware archive for the Netis DL4311 network device, hardware version 2.1, compressed as a 1.64 MB rar. Netis DL-series units are ADSL modem routers, and a full flash dump like this is used to restore a unit that is bricked, boot-looping or stuck after a failed upgrade. Write it to the SPI flash with a programmer or through the bootloader, depending on the contents. Make sure the hardware version on the device label is V2.1, keep a backup of the original flash, and check that the image size matches the chip.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →