In "Read and write data with Java's I/O streams," we started to explore the input/output (I/O) classes, interfaces, and operations provided by the Java platform. Now, we'll continue our exploration of ...

I wrote a pair of apps, one a server and one a client, and they were free-standing java programs. They work seamlessly, only now we want to run the client from behind a firewall, and it's not working.

The two most common transport layer protocols are the transmission control protocol (TCP) and the user datagram protocol (UDP). One of the main differences between the two protocols is reliability.