- Economic structure; introduction
- Economic structure; transparent customers
- Economic structure; digital euphoria
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Internet Protocol Number (IP Number)
Every computer using  TCP/IP has a 32 bit-Internet address, an IP number. This number consists of a network identifier and of a host identifier. The network identifier is registered at and allocated by a Network Information Center (NIC), the host identifier is allocated by the local network administration.
IP numbers are divided into three classes. Class A is restricted for big-sized organizations, Class B to medium-sized ones as universities, and Class C is dedicated to small networks.
Because of the increasing number of networks worldwide, networks belonging together, as LANs forming a corporate network, are allocated a single IP number.
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