©  Antonio Vazquez 2016

Antonio Vazquez, Learn CentOS Linux Network Services, 10.1007/978-1-4842-2379-6_3

3. Networking

Antonio Vazquez

(1)Madrid, Madrid, Spain

In this day and age, a computer that is completely isolated from the outer world is pretty much useless. Many everyday tasks, such as sending or receiving e-mail, sharing files, or querying a database, require an external connection.

In order to communicate, computers use a software component called a network protocol. I won’t go into detail about the different network protocols, as there are already many books on the subject. There are actually many network protocols, but the de facto standard is the TCP/IP protocol.

3.1 IPv4

This protocol was developed in the ’70s by the Defense Advanced ...

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