socket
The socket module provides access to the standard BSD socket interface. Although it’s based on UNIX, this module is available on all platforms. The socket interface is designed to be generic and is capable of supporting a wide variety of networking protocols (Internet, IPX, Appletalk, and so on). However, the most common protocol is the Internet Protocol (IP), which includes both TCP and UDP. Python supports both IPv4 and IPv6, although IPv4 is far more common.
It should be noted that this module is relatively low-level, providing direct access to the network functions provided by the operating system. If you are writing a network application, it may be easier to use modules described in Chapter 22, “Internet Application Protocols,” or ...
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