Introduction to part 2: Network programming with TCP and UDP

The answer was:

What happens when you browse the Web

1. You request a resource (e.g. a file) from a web server.
2. The web server opens the file.
3. The web server reads the file.
4. The web server sends the file to you.
5. Your web browser receives the file.
6. Your web browser displays the file.

The whole process uses input/output (IO) operations!

How does a web server work

1. A process is started on the server.
2. This process opens a socket on a specific port.
3. The process waits for a connection.
4. A client (another process) connects to the server.
5. The server and the client exchange data.
6. The client or server closes the connection.

The server and the client communicate over the network using a network protocol, exchanging data the same way as IOs operations.

What will you learn?

• Learn about the electronic messaging protocols.
• What is an application protocol.
• What is the TCP protocol.
• What is the UDP protocol.
• Learn the differences between TCP and UDP.
• Manage multiple connections with Java network concurrency.

What will you accomplish?

• Define and implement a game called "Guess the number" with TCP.
• Define and implement an application called "Temperature monitoring" with UDP.
• Define, implement and share your own network application.

Sources

• Main illustration by Alina Grubnyak on Unsplash
• Illustration by Unseen Studio on Unsplash
• Illustration by Jared Erondu on Unsplash