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Leopard Reference
Networking capabilities in Mac OS X include support for the major protocols and services. Developers can gain access to them through sockets and Core Services, as well as through the higher-level Carbon and Cocoa APIs.

Provides a guided introduction to developing network-capable applications for Mac OS X.   Essential information for developers using Apple's networking environment.   API references organized by framework.
Networking Topics
View the complete Networking Reference List.
A networking technology for registering services for easy access by applications.   C APIs for adding networking features to Carbon applications.   Objective-C APIs that support networking features in Cocoa applications.

Protocols and services that support networking using Core Foundation.   Low-level open source networking and communication technologies.   Resources for creating Internet and web applications, services, or content.

Protocols and services that support networking for server-related products.   Programming interfaces for secure communication over a network.  

View legacy documents, including technologies, features, products, APIs, and programming techniques that are no longer supported or have been superseded.