This object holds a manually configured file name pointing to an "indirect" file, which in turn names the actual firmware image the DHCP client should download during auto-configuration. Administrators set it when they want to control image selection through a two-step indirection rather than hardcoding the image name directly in DHCP options. Setting it to a value like "image-pointer.txt" would tell the device to first read that file to learn the real firmware filename to fetch.