HP 200 Series Services And Applications page 166

AppleTalk Phase 2 Routing Service
AppleTalk Protocols
Datagram Delivery Protocol (DDP)
Provides a "best-effort" socket-to-socket delivery of datagrams over
an AppleTalk internet.
Acquires the AppleTalk network number.
Routing Table Maintenance Protocol (RTMP)
Builds and maintains the AppleTalk routing table. Each table entry
includes a destination network range, the AppleTalk node address
(network number and node identifier) through which the destination
is reached, the number of router hops to the destination, and the
route status.
Zone Information Protocol (ZIP)
Determines which networks belong to which zones by maintaining
the Zone Information Table (ZIT) on each router. The ZIT provides
an internet-wide mapping of network number ranges to zone names.
Note that the ZIT is not displayed by the HP routers. However, the
Local Zone Table, a table of zone names configured on a particular
router, can be displayed using NCL's Rgetat command.
Name Binding Protocol (NBP) on a Router
Maps network entity names with internet addresses. It allows you to
specify descriptive or symbolic names, while other processes may
refer to the same entity numerically (for instance, by node
addresses).
Facilitates the internet-wide device-name-lookup process.
Uses ZIP to determine which networks contain nodes that belong to
a zone.
Provides a list of available services within a zone to clients.
AppleTalk Echo Protocol (AEP)
Tests whether a destination node is reachable. AEP enables a node
to send a request packet to another internet node and to receive a
response packet back. The command used is Atping.
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