UDP and TCP Sockets Socket / ServerSocket Useful for Client/Server TCP Socket programming Usual Steps on the Client Open a socket Open an input stream and output stream to the socket Read from and write to the stream according to the server's protocol Close the streams Close the socket Usual Steps on the Server Open the server's socket Open an output stream to the server's socket Wait for a client to connect When successfully connected,  keep track of the returned client socket Open an input stream to the client socket Read from the server's socket and write to the client's socket according to server protocol When the client disconnects Close the client stream and socket Close the server's stream and socket DatagramSocket / DatagramPacket Useful for Client/Server UDP Socket programming Usual Steps on the Client Open a DatagramSocket Send a DatagramPacket to a known server (optional) receive the server's DatagramPacket response Close the DatagramSocket Usual Steps on the Server Open a DatagramSocket Wait for a DatagramPacket to be received Process the contents of the packet and (optionally) respond according to server protocol (optional) send a DatagramPacket to the sender Close the DatagramSocket QuoteServer.java QuoteServerThread.java QuoteClient.java