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Overview of socket API. ...
Overview of socket API.
A socket is an interface for an application to connect to a host‘s network stack (part of the OS). Sockets provide an abstraction of the network. Applications use the transport services available on the socket interface for communication with a peer application.
Transport protocol such as TCP, UDP or SCTP offer different levels of service. TCP for example provides reliable stream-oriented transport service while UDP more reflects the best-effort kind of service provided by the underlying IP protocol layer.
Sockets are bound to a transport address. For TCP/IP sockets this means an IP address and port number.
Sockets provide only very basic data transport services without any higher level functions like parameter marshaling or serialization. These functions have to be performed by the applications. These functions are often hidden in middleware platforms like distributed object technologies (CORBA, RMI, DCOM) or web service frameworks (WCF, JAX-WS).
Multicast sockets make the IP multicast capability accessible to applications. Multicast sockets are often used for streaming services where multiple applications are recipients of the same data packets.
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