雷波县八寨九年一贯制学校-知识网

The internet's evolution began as a military experiment post-World War II and has undergone two main phases. The first phase was its development from a military network to a civilian utility, which lasted until 1995. This included the creation of technologies like packet switching by the RAND Corporation in the early 1970s, which allowed for secure voice messages. The second phase involved the commercialization of the network, leading to the internet becoming one of the primary sources of information and communication in the developed world . Would you like more detailed information on any specific aspect of this evolution?