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===ATP (AppleTalk Transaction Protocol)===
 
===ATP (AppleTalk Transaction Protocol)===
 
A transport-layer protocol that can provide reliable packet transport. Packets are transported within the framework of a transaction (an interaction between a requesting and a responding entity program or node).
 
A transport-layer protocol that can provide reliable packet transport. Packets are transported within the framework of a transaction (an interaction between a requesting and a responding entity program or node).
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The AppleTalk Transaction Protocol (ATP) is a connectionless transaction-based protocol that allows two endpoints to execute request-and-response transactions. Either ATP endpoint can request another ATP endpoint to perform an action; the other ATP endpoint then carries out the action and transmits a response reporting the outcome. ATP provides reliable delivery of data by ensuring that data packets are delivered in the correct sequence and by retransmitting any packets that are lost.
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ATP is useful if your application sends small amounts of data and can tolerate a minor degree of performance degradation. Games that are based on request-and-response dialogs can make efficient use of ATP.
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===AURP (AppleTalk Update Routing Protocol)===
 
===AURP (AppleTalk Update Routing Protocol)===
 
A transport-layer routing protocol that is similar to RTMP (Routing Table Maintenance Protocol) but that updates the routing table only when a change has been made to the network.
 
A transport-layer routing protocol that is similar to RTMP (Routing Table Maintenance Protocol) but that updates the routing table only when a change has been made to the network.