Computer Network (6th edition)-1.1 The role of computer network in the information Age

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Some important features of the 21st century are digitalization, networking and informatization, which is a network-centric information age.
Network has now become the lifeblood of the information society and the important foundation of developing knowledge economy.
Network refers to "three networks", that is, telecommunications networks, cable television networks and computer networks.
The fastest-growing and central role is the computer network.

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After entering the the 1990s, the Internet as the representative of the computer network has been rapid development.
has gradually developed from the initial educational research network to a commercial network.
has become the world's second largest network after the global telephone network.

1. The Internet is the Diao computer network

2. However, the global telephone network 233

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The internet is the biggest change in human communication since printing.
Now people's life, work, study and intercourse have been inseparable from the Internet.

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Connectivity--The computer network allows users to exchange information between them, as if these users ' computers can be directly connected to each other.
Sharing-that is, resource sharing. It can be information sharing, software sharing, or hardware sharing.

Connectivity: one-on-one, synchronous

Sharing: One-to-many, asynchronous

Computer Network (6th edition)-1.1 The role of computer network in the information Age