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Apple Open Transport Protocol

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Apple Open Transport is Apple's solution for transport-independent networking for the Mac OS. Transport independence is designed to free network developers and users from any need to know about the underlying network. Open Transport brings together the technologies to support transport-independent applications. It provides a consistent set of network services across multiple protocols, including AppleTalk and TCP/IP. It also provides a name-to-network address mapping service so users can access resources using familiar names rather than cryptic network addresses. New implementations of Mac OS protocol stacks have been released that replace existing AppleTalk and TCP/IP implementations, including support for PPP (Point-to-Point Protocol), NetWare NCP and IPX, Windows 95 and Windows NT (SMB/TCP/NetBIOS), DECnet, and LAT.

In late 1998, Apple introduced an Open Transport Protocol update with its Mac OS 8.5. The update includes support for DHCP (Dynamic Host Configuration Protocol) and SNMP (Simple Network Management Protocol). It also replaced PPP (Point-to-Point Protocol) with ARA (Apple Remote Access).

With the release of Open Transport, Apple minimized development work on its traditional AppleTalk protocol stack in favor of Open Transport. Likewise, MacTCP (the TCP/IP protocol stack in early releases of Mac OS) was pushed aside in favor of Open Transport.

Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.
All rights reserved under Pan American and International copyright conventions.