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Leopard Reference: Cocoa
Networking capabilities in Mac OS X include support for the major protocols and services. Developers can use the networking APIs to provide sophisticated LAN, WAN, Internet, and web capabilities in Cocoa applications. These are accessible through sockets and Core Foundation, as well as through the higher-level Cocoa APIs.

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NSNetService Class Reference (HTML) (PDF)
Describes a network service that an application publishes or uses as a client.
2009-04-08
NSNetServiceBrowser Class Reference (HTML) (PDF)
Describes a query for published network services.
2009-04-08
NSURL Class Reference (HTML) (PDF)
Describes a string that uniquely identifies a resource.
2009-02-04
NSURLHandle Class Reference (HTML) (PDF)
Describes a deprecated technology replaced by the NSURLDownload class.
2009-02-04
NSOutputStream Class Reference (HTML) (PDF)
Describes a write-only data stream.
2009-01-06
NSHTTPCookie Class Reference (HTML) (PDF)
Describes an opaque set of data that represents state or configuration.
2008-11-13
NSSocketPort Class Reference (HTML) (PDF)
Describes a BSD socket for distributed object connections or raw messaging.
2008-10-15
NSStream Class Reference (HTML) (PDF)
Describes an interface for reading and writing data.
2008-10-15
NSCachedURLResponse Class Reference (HTML) (PDF)
Describes a cached response to a URL load request.
2008-05-02
NSURLCache Class Reference (HTML) (PDF)
Describes a collection of cached responses and data.
2008-03-11
NSURLResponse Class Reference (HTML) (PDF)
Describes the metadata returned by a server for a load request.
2007-12-11
CBGroupIdentity Class Reference (HTML) (PDF)
Describes the class for operating on user identities.
2007-05-14
CBIdentity Class Reference (HTML) (PDF)
Describes the class used to create and operate on identities.
2007-05-14
CBIdentityAuthority Class Reference (HTML) (PDF)
Describes the class used to manipulate identity authority databases.
2007-05-14
CBIdentityPicker Class Reference (HTML) (PDF)
Describes the class that manages the identity picker.
2007-05-14
CBUserIdentity Class Reference (HTML) (PDF)
Describes the class for operating on user identities.
2007-05-14
Collaboration Framework Reference (HTML) (PDF)
Describes the Objective-C API for monitoring and editing identities.
2007-05-14
Identity Services Reference Collection (HTML) (PDF)
Describes the APIs for using identities and the Identity Picker.
2007-05-14
NSInputStream Class Reference (HTML) (PDF)
Describes a read-only data stream.
2007-04-05
NSURLConnection Class Reference (HTML) (PDF)
Describes the class that provides support for retrieving data from a server in response to a URL load request.
2007-04-01
NSURLProtocol Class Reference (HTML) (PDF)
Describes the interface for protocol-specific loading of URL data.
2007-04-01
NSURLRequest Class Reference (HTML) (PDF)
Describes a request for a resource identified by a URL.
2007-04-01
NSHost Class Reference (HTML) (PDF)
Describes a representation of a network host.
2007-03-24
NSSocketPortNameServer Class Reference (HTML) (PDF)
Describes a registrar of named TCP/IP sockets.
2007-02-26
NSMessagePortNameServer Class Reference (HTML) (PDF)
Describes a facility that accepts and returns message ports.
2007-02-23
NSURLClient Protocol Reference (HTML) (PDF)
Deprecated - Describes the deprecated class replaced by the classes NSURLConnection and NSURLDownload.
2006-08-01
NSURLCredential Class Reference (HTML) (PDF)
Describes a credential used to authenticate a URL load request.
2006-06-28
NSHTTPCookieStorage Class Reference (HTML) (PDF)
Describes a collection of cookies shared across all applications.
2006-05-23
NSHTTPURLResponse Class Reference (HTML) (PDF)
Describes a response to an HTTP request.
2006-05-23
NSMessagePort Class Reference (HTML) (PDF)
Describes an endpoint for distributed object connections or interprocess messaging.
2006-05-23
NSMutableURLRequest Class Reference (HTML) (PDF)
Describes a mutable request for a resource identified by a URL.
2006-05-23
NSURL Additions Reference (HTML) (PDF)
Describes additions to support pasteboards.
2006-05-23
NSURLAuthenticationChallenge Class Reference (HTML) (PDF)
Describes a challenge from a server requiring authentication from the client.
2006-05-23
NSURLAuthenticationChallengeSender Protocol Reference (HTML) (PDF)
Describes the interface for receiving authentication challenges.
2006-05-23
NSURLCredentialStorage Class Reference (HTML) (PDF)
Describes a mapping of credentials to their corresponding protection spaces.
2006-05-23
NSURLDownload Class Reference (HTML) (PDF)
Describes a connection used to download data to a file.
2006-05-23
NSURLHandleClient Protocol Reference (HTML) (PDF)
Describes a deprecated technology replaced by the NSURLDownload class.
2006-05-23
NSURLProtectionSpace Class Reference (HTML) (PDF)
Describes an area on a server that requires authentication of URL load requests.
2006-05-23
NSURLProtocolClient Protocol Reference (HTML) (PDF)
Describes the interface used by protocol objects to communicate with the URL loading system.
2006-05-23