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Built on top of AppleTalk Session Protocol (for legacy AFP over DDP) or the Data Stream Interface (for AFP over TCP), it provides services for authenticating users (extensible to different authentication methods including two-way random-number exchange) and for performing operations specific to the Macintosh HFS filesystem. The following table provides a few recommended types of power and control cable by general application. For socket numbers, a few well-known numbers were reserved for special purposes specific to the AppleTalk protocol itself. At the time it was being developed, a full, reliable connection-oriented protocol like TCP was considered to be too expensive to implement for most of the intended uses of AppleTalk. As NBP names translated to an address, which included a socket number as well as a node number, a name in AppleTalk mapped directly to a service being provided by a machine, which was entirely separate from the name of the machine itself. AppleTalk had an included attention message system which allowed short messages to be sent which would bypass the normal stream data flow.

The Name Binding Protocol (NBP) was a dynamic, distributed system for managing AppleTalk names. The AppleTalk Address Resolution Protocol (AARP) resolves AppleTalk addresses to link layer addresses. The AppleTalk Data Stream Protocol (ADSP) was a comparatively late addition to the AppleTalk protocol suite, done when it became clear that a TCP-style reliable connection-oriented transport was needed. Some newer protocols, such as Kerberos and Active Directory use DNS SRV records to identify services by name, which is much closer to the AppleTalk model. Contrast this with A records in the DNS, in which a name translates to a machine's address, not including the port number that might be providing a service. And the same machine could host any number of instances of services of the same type, without any network connection conflicts. Thus, services could be moved to a different machine and, so long as they kept the same service name, there was no need for users to do anything different in order to continue accessing the service. There were no "half-open" connections; once one end initiated a tear-down of the connection, the whole connection would be closed (i.e., ADSP is full-duplex, not dual simplex).

This use of ATP provided automatic flow control; each end could only send data to the other end if there was an outstanding ATP request to respond to. When a PAP connection was opened, each end sent the other an ATP request which basically meant "send me more data". Even while it was busy servicing a print job from one client, a PAP server could continue to respond to status requests from any number of other clients. PAP also provided for out-of-band status queries, handled by separate ATP transactions. It provided basic services for requesting responses to arbitrary commands and performing out-of-band status queries. This way, it could respond to duplicate requests with the same transaction ID by resending the same response data, without performing the actual operation again. The client's response to the server was to send a block of PostScript code, while the server could respond with any diagnostic messages that might be generated as a result, after which another "send-more-data" request was sent.

By pulling or releasing on the clutch lever, you can shift gears seamlessly while driving, ensuring a comfortable and efficient driving experience. According to the World Bank, the North American region contributes up to 28% of the global GDP.North America is also considered as a key region for maritime activities, and the growth of coastal shipping in this region is also propelling the demand for military ships.The growth of the market in this region can be attributed to the high military spending in the US and the increasing procurement of highly advanced armored vehicles. Our services are not limited to any specific region or a stipulated sector. Because of this dynamism, users could not be expected to access services by specifying their address. On a network with many machines it may take several tries before a free address is found, so for performance purposes the successful address is recorded in NVRAM and used as the default address in the future.

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