Socket vs. Port

A socket is an end point of a bidirectional communication.

a port is a logical data connection that can be used to exchange data without the use of a temporary file or storage.

Association between Socket and Port

A socket is associated with a port and there can be multiple sockets associated with a port.

There can be a single passive socket associated with a port that is waiting for incoming connections.

There can be multiple active sockets that correspond to connections that are open in that port.