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AppleTalk transaction protocol (ATP)

The AppleTalk Transaction Protocol( ATP) used on the transport layer is used for unsecured data transport in an AppleTalk network. Functionally, it is comparable to the User Datagram Protocol( UDP).

The AppleTalk Transaction Protocol is based on the Datagram Delivery Protocol( DDP) and supports lossless transaction services between sockets. The services supported by the ATP protocol allow data exchange between two clients, where one client requests the other to perform a specific task. The protocol supports request and response aggregation to provide reliable request and response exchanges.

The reliable exchange of requests and responses is governed by two transaction services. Here, the requesting client repeats its requests until it receives a response or until it reaches a certain number of requests. In At-Least-Once (ALO), the request mechanism ensures that at least one request has been submitted. The second ATP transaction mechanism is Exactly-Once( XO).

Englisch: AppleTalk transaction protocol - ATP
Updated at: 07.05.2013
#Words: 143
Links: AppleTalk, ALPS tunneling protocol (ATP), transport layer, data, network
Translations: DE

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