A socket is one end-point of a two-way communication link between two programs running on the network.
A socket is bound to a port number so that the TCP layer can identify the application that data is destined to be sent.
Socket classes is basically a type of class, Which is used to represent the connection between a client program and a server program. The java.net package provides two classes :
Which implement the client side of the connection and the server side of the connection, respectively.