The diagram on page 129 of the "AppleTalk Internet Router Administrator's
Guide" is misleading. A LocalTalk network can be associated with only one
zone. This is the same as it was with AppleTalk Phase 1.
With AppleTalk Phase 2, any node on an AppleTalk network (other than LocalTalk)
can belong to any zone selected from a list of available zone names. This
would include EtherTalk 2.0 and TokenTalk 2.0. More information on this is on
page 4 of the "AppleTalk Phase 2 Introduction and Upgrade Guide".