HP 200 Series Services And Applications page 163

AppleTalk Phase 2 Routing Service
Zones
Zones
AppleTalk nodes and networks are assigned zones in which they will reside.
Zones are logical grouping of nodes that share the same network resources.
Zones may encompass more than one network. Nodes in a zone need not be
physically contiguous and need not have the same network number. A
unique zone name, an alphanumeric string of up to 32 characters, is assigned
to each zone.
If you assign easy-to-remember zone names, network devices in a large
internet can be looked up easily. Name searching can be done within one or
more user-specified zones. Each node in an AppleTalk internet can select
one of several possible zone names from the list of allowable names for its
network. The seed router on each AppleTalk LAN network is configured
with a list of zone names that can be used by nodes on that LAN. If a node on
a network is assigned a zone name that is not on the configured list, the seed
router will assign the default zone name to that node. The default zone name
is the AppleTalk zone name that will be assigned to any node in the attached
network that was not assigned its own zone name.
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