The EtherTalk software that ships with System 7.0 and System 7.0.1 was
written prior to the introduction of the Ethernet NB board. In this case,
the software was written with System 7.0 and carried forward to System
7.0.1, so it doesn't install an Ethernet driver for the Ethernet NB board.
It only installs a driver for the older EtherTalk NB board and the built-in
Ethernet on the Macintosh Quadras.
You can find the most current versions of Ethernet software for all of our
boards on the NSI 1.1 disk. You can find an image of this disk in the
Software Updates folder on AppleLink.