What Is an Extranet?

Extranet is a special network channel between units based on the Internet or other public network facilities in order to exchange business information frequently between different units. Extranets not only require fast and secure data transmission between externally connected units, but also strict access control over mutual access through externally connected VPN tunnels.

"Extranet"

Because extranets involve the local area networks of different units, not only must we ensure the security of information during transmission, but we must also ensure that the counterparty cannot exceed its authority and connect to its own intranet through the extranet. In the field of e-government, VPN extranets are often used in systems such as: online tax reporting systems, corporate auditing and supervision, networked office of people's congress representatives, electronic customs declaration, government information centers, and information centers of various commissions and offices.

Building an extranet not only requires the ability to achieve rapid and secure

The extranet claims that its main purpose is to reduce the global information gap, and is aimed at the current high cost of Internet access and the lack of Internet access in many places. Judging from its current planning, the project started its first round of technical evaluation in December 2013, and is now in the stage of satellite model development and long-distance WiFi multipoint transmission testing. After the project is completed, the form is mainly based on one-way transmission similar to TV. Through this channel, news, education courses, mobile phone applications, movies, music are transmitted to users, and occasionally it acts as a communication channel in disaster relief situations (this (Two-way)) and so on. ^[1]

Because the running trajectory of the CubeSats satellite is difficult to maintain for a long time, and the "Extranet" project did not propose a suitable satellite replacement plan, the future of the project is still full of uncertainties. Secondly, global WiFi also involves personal privacy issues. Once this wireless network is implemented, it will become

In the future, if the Internet of Things is also integrated into the large network of "Extranet", then the nerves equivalent to "Smart Earth" will be tightly controlled in the hands of a few people. This is by no means alarmist. As people's lives will increasingly depend on wireless terminals in the future, a smartphone can control computers, home appliances, and even cars, and with the development of high technology, everything in people's lives will be intelligent and networked. , And incorporated into the Internet of Things, becoming part of the "Smart Earth". The "Extranet" seems to be its most qualified carrier, but no one can guarantee that this network will always remain "neutral."

Needless to say, the concept of "extranet" is indeed an important development direction of the future Internet, but it must not be controlled by an organization, company, or country, but should be an extension of the Internet. All human beings. This requires that all countries should respect the cyber sovereignty of other countries from the physical and logical levels in order to jointly build a peaceful, secure, open and cooperative cyberspace. ^[2]