3Com CoreBuilder 3500, Implementation Manual, Page: 452 / 592

452 C
HAPTER
16: A
PPLE
T
ALK
Table 58
Routing Table for Router 24 in Figure 80
You view the AppleTalk routing tables in your network through the
Administration Console.
AppleTalk Echo Protocol (AEP) AppleTalk nodes use the AEP to send
datagrams to other nodes in the network. The AEP datagram transmitted
causes the destination node to return, or
echo , the datagram to the
sending node. This protocol determines whether a node is accessible
before any sessions are started, and it enables users to estimate the
round-trip delay time between nodes.
AppleTalk Transaction Protocol (ATP) This protocol, along with the
AppleTalk Data Stream Protocol (ADSP), ensures delivery of DDP packets
to a destination without any losses or corruption.
Name Binding Protocol (NBP) This protocol translates alphanumeric
entity names to AppleTalk addresses. NBP maintains a table of node
addresses and named entities within each node. Because each node also
maintains its own list of named entities, the names directory within an
AppleTalk network is not centralized. The names directory database is
distributed among all nodes on the intranet.
Session Layer Protocols
An AppleTalk intranet has four session-layer protocols:
■
AppleTalk Data Stream Protocol (ADSP)
■
Zone Information Protocol (ZIP)
■
AppleTalk Session Protocol (ASP)
■
Printer Access Protocol (PAP)
Network Range Distance (hops) Interface State
5-5 1 2 Good
12-12 3 3 Good
18-20 2 3 Good
103-103 0 1 Good
64-64 1 3 Good