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4. Networking
Last updated: 1 February 2013.

In this chapter, the intended purpose of the two first sections (4.1 and 4.2) is to give you an overview of what computer networks are and how they work, without any reference to the Java language. In particular, the following topics are discussed: The 7 layers of the OSI model, the TCP/IP model, protocols, IP addresses, the domain name system (DNS), the client/server model and port numbers. If you are familiar with these topics, you can skip the two first sections and start with the section 4.3 and the following to learn how to create simple TCP and UDP servers/clients in Java.



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