Final answer:
The purpose of a computer network is communication, allowing for the exchange of data and resources which has revolutionized global interactions in government, business, and personal spheres.
Step-by-step explanation:
The purpose of a computer network can be summarized in a single word: communication. Computer networks facilitate the sharing of information, resources, and services over interconnected systems.
They have been integral in shaping the modern digital landscape, from the early implementations like the semi-automatic business research environment (SABRE) and the Advanced Research Projects Agency Network (ARPANET), to the expansive World Wide Web that interlinks hypertext web pages.
These networks enable users to exchange data, access multi-media content, and participate in social engagements, thus transforming the way governments, businesses, and individuals interact and operate globally.
Telecommunications through computer networks have revolutionized long-distance economic activities, allowing for the efficient transfer of valuable products and services that exist as information, such as computer software and financial advice.
These advancements have also played a crucial role in social dynamics, enabling people to connect across vast geographic distances for purposes ranging from entertainment to education and political awareness.