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Understanding TCP/IP by Libor Dostálek, Alena Kabelová

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6.2 Network: Second Period of History

In 1993, the RFC 1517 1520 Classless Inter-Domain Routing (CIDR) specifications were released. These specifications are only seldom referred to nowadays, but had changed the understanding of the term ‘network’ in the context of the Internet. Networks started to be regarded in terms of network masks instead of network classes.

The computer address part of the IP address was divided into two parts, the subnetwork address and the computer address.

6.2 Network: Second Period of History

Figure 6.2: IP address structure

From the network address point of view, the network address and the subnetwork address form one unit. Briefly speaking, the IP address ...

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