The Internet was born around the 1950s and’ 60s. Some years later, around the’ 80s, the notion of the socket was introduced on BSD (Berkeley Software Distribution—a Unix variant) for communication between processes using Internet Protocol (IP). A few years later, in 1996, JDK 1.0 brought the notion of the socket to the programming world as a model for network communications that it is easy to use and cross-platform. Finally, programmers can now create network applications without years of study about network communications. Java developers can write a simple network application just by scratching the surface of a few subjects, such as IP, IP addresses, ports, and Java networks.
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