Apple Workgroup Server 8550 - Manual (Page 36)

Using multiple network segments
By installing additional PCI network cards (and associated software), you can
connect your server to a variety of networks. To use more than one network
segment at the same time, you will also need network server software that
supports multihoming on PCI-based systems (such as AppleShare 4.2.1). The
following illustration is an example of a server that has multihoming enabled
on the built-in Ethernet and LocalTalk connections, as well as on two
additional network connections provided by PCI network cards.
Multihoming allows
this server to communicate
with up to four networks.
Ethernet connection
LocalTalk connection
Other network connections
Building a high-performance network 27