AppleTalk Session Protocol
Das AppleTalk Session Protocol, oder kurz ASP, ist ein Protokoll, das einen gesicherten Datentransport in einem AppleTalk-Netz ermöglicht. ASP ist eine Erweiterung des AppleTalk Transaction Protocols und erlaubt zwei Prozessen den Austausch von Transaktionen und Befehlen.
Es ist definiert in RFC 1742.[1]
Das Protokoll gehört zur Sitzungsschicht.
Der AppleTalk-Protokollstapel
Die AppleTalk-Protokolle lassen sich in mehrere Schichten einteilen, die einen Protokollstapel (protocol stack) bilden. Die Protokolle lassen sich wie folgt in das ISO-OSI-Referenzmodell einordnen:
| OSI-Schicht | AppleTalk Protokollstapel | ||||||
| 7 | AFP | PAP | |||||
| 6 | |||||||
| 5 | ZIP | ASP | ADSP | ||||
| 4 | ATP | AEP | NBP | RTMP | |||
| 3 | DDP | ||||||
| 2 | LLAP | ELAP | TLAP | FDDI | ←AARP | ||
| 1 | LocalTalk | Ethernet Treiber |
Token Ring Treiber |
FDDI Treiber |
|||
Literatur
- Sidhu, Andrews, Oppenheimer: Inside AppleTalk. 2. Auflage. Addison-Wesley, 1999.
- Inside Macintosh: Networking. 2. Auflage. Apple Computer Inc., Addison-Wesley, 1994, Chapter 1 – Introduction to AppleTalk; developer.apple.com/legacy
Einzelnachweise
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