Page modified: Friday, June 23, 2006 20:28:34
Appletalk was developed by Apple computers into the 1980er years, in order to make a simple entrance possible to common resources such as files or printers in the net. It covers a set of minutes, those in accordance with the OSI model structured being Appletalk is a registered registered trade mark of Apple computer, Inc. In view of the far spreading of IP-based networks, Appletalk was given up meanwhile by Apple.
Appletalk minutes
The Appletalk family covers the following minutes (groups after net layers):
Application and presentation layer
- Apple Filing Protocol (AFP) - access to together used files
- Appletalk printer ACCESS Protocol (PAP) - data exchange with pressure services
Meeting layer
- Zone information Protocol (ZIP) - supplies information about the own net zone and other zones
- Appletalk session Protocol (ASP) - minutes for the control of meetings
- Appletalk DATA Stream Protocol (ADSP) - connectingoriented minutes for the change of data streams
Transport layer
- Appletalk Transaction Protocol (ATP) - transaction minutes, which guarantee reliable, sequence-faithful package distribution
- Appletalk echo Protocol (AEP) - is used, in order to determine and to determine around the accessibility of a power pack taker the Round Trip time.
- Name being thing Protocol (NBP) - assignment of names for addresses
- Routing Table maintenance Protocol (RTMP) - administration of Routing tables
Net layer
- Datagram Delivery Protocol (strip packing) - connectingless, unreliable datagram distribution service
Session layer and physical layer
Several connecting access minutes (link ACCESS Protocols, LAP) are supported, which are administered by the LAP manager in such a way specified.
- Local talc LAP (LLAP)
- Ethernet LAP (ELAP)
- Token ring LAP (TLAP)
- FDDI (Fiber Distributed Data Interface)
- Appletalk Address Resolution Protocol (AARP) - address conversion between network addresses, which are used of strip packing, and device addresses of the session layer.
The physical layer covers the drivers for net interfaces.
The Appletalk minutes pile
Appletalk minutes can be divided into several layers, which form a minutes pile (protocol stack). Minutes can be arranged as follows in the ISO OSI reference model:
| OSI layer | Appletalk minutes pile |
| 7 | | | AFP | PAP | | |
| 6 | | | | | | |
| 5 | ZIP | ASP | | ADSP | |
| 4 | | ATP | | AEP | NBP | RTMP |
| 3 | Strip packing |
| 2 | | LLAP | ELAP | TLAP | FDDI | | |
| 1 | | Local talc | EthernetTreiber | Token ring driver | FDDI driver | |
Literature
- Sidhu, Andrew, Oppenheimer: Inside Appletalk, 2nd, Addison-Wesley, 1999
- Apple Computer Inc.: Inside Macintosh: Networking, 2nd, Addison-Wesley, 1994, Chapter 1 - Introduction ton of Appletalk (on-line version)