Introduction: North Korea on the afternoon of the 22nd began to appear the Internet is very unstable, basically in the "network can not be connected" state, the 23rd morning network is basically restored. This makes the outside world speculate that the North Korean disconnection is the United States because of the Sony Pictures black incident and take retaliatory action.
Core institutions and personnel can only go on the Internet
North Korea's current Internet civilization penetration rate is not too high, generally more core institutions and personnel in the use of the North Korea has never been publicly related to the construction and operation of the domestic Internet infrastructure information, which is the core of the secret information. CNN (CNN) reported on the 22nd, North Korea only 1024 known IP addresses. In contrast, the United States has 1.5 billion IP addresses. It is worth noting that not every IP address is for only one computer. As a result, thousands of devices may be connected to the Internet in North Korea, CNN said, citing data from companies that monitor Internet traffic, adding that Internet traffic across North Korea is equivalent to that of just 1,000 high-speed Internet homes in the United States.
North Korean military personnel accessing the Internet
The U.S.-based *** noted that North Korean Internet Protocol addresses are provided by a state-run Internet service provider called Star J.V.C., and that most communication lines go through the networks of Chinese carriers. Foreign media also reported that North Korea mainly accesses the global Internet through land lines bordering China or satellite lines of Russia's Satcom. In this regard, Tan Xiaosheng, a Chinese network security expert, told the Global Times on the 23rd that it is possible and very normal for North Korea to access the Internet through a certain Chinese operator. From a technical point of view, the Internet is a number of operators interconnected to connect the Internet. China's Unicom, Mobile and other carriers also need to connect with U.S. carriers to allow Chinese users to use the Internet. By the same token, if North Korea wants to access the Internet, it must be connected to the outside world through some kind of medium, for example, its optical fiber must be connected to the outside world. Of course the access method is just like transferring an airplane, you can fly from North Korea to Beijing and then transfer to the United States, or you can fly to Russia and then transfer to the United States. But Tan emphasized that even if North Korea is using a Chinese operator's network, it is only the equivalent of driving on the highway, and a car accident that is the responsibility of the driver, not the responsibility of the highway operator.
At present, the Global Times reporter in Pyongyang using North Korea's wired Internet (North Korea is now strictly prohibited to use Wifi), monthly monthly fee of about 545 U.S. dollars, the charge unit for the North Korean Star Cooperative Society, the Internet speed is theoretically 2M, basically meet the needs of the work, the video chat is no problem. In addition to wired Internet, foreigners in North Korea can also access the Internet through cell phones. The Associated Press reported on the 23rd that an Egyptian company built a 3G network in the DPRK five years ago, which now covers most major cities. 2013, the DPRK began to allow foreigners to access the Internet through the 3G network. The Global Times reporter's cell phone Internet access monthly fee of about 14 U.S. dollars, free 50M flow per month, the charge unit for the North Korean Koryolink Society, beyond the part in accordance with the standard charge of about 1 yuan per megabyte.
A birthday greeting on a bulletin board on North Korea's intranet
According to a Global Times reporter in Pyongyang, foreigners and North Koreans use different networks in North Korea. Nationals have a network they use, the "Gwangmyeongnet," which is a kind of domestic local area network covering all provinces, cities and counties in the country, but not connected to the Internet. The content includes knowledge on politics, economy, science, culture and other aspects. The DPRK completed the construction of this network as early as 2000 and began to put it into use nationwide. Domestic users in the DPRK can access the Internet through telephone lines by simply going to each telephone branch office to go through the procedures of applying for access to the network. The main purpose of this DPRK intranet is to allow its citizens to receive information from official DPRK websites. DPRK users can access some official DPRK websites, and North Koreans can also download relevant books and materials from this intranet, and there is even a bulletin board with a prototype version of social media, which is used to provide college students with the opportunity to post songs or birthday greetings for professors and other information. KCNA has previously reported that the fiber-optic communication network that the DPRK has built nationwide has expanded the information transfer capacity between the central and provincial levels of the DPRK by hundreds of times; all telephone exchanges have been digitized, thus expanding the automatic exchange capacity of telephones by nearly 20 times.
In Pyongyang, the library of the Kimzey Institute of Technology Comprehensive University has computer-themed books
According to South Korea's Panorama News, the people's hospitals of nine provinces throughout North Korea have achieved 100M fiber-optic communication, which allows them to send and receive audio and video information communication. The most famous Kim Man-u Hospital in Pyongyang City is networked with local hospitals such as the People's Hospital of North Pyongan Province and the Mangyongdae District through fiber optics. Excellent medical specialists can treat and manage the health of patients across the country from Pyongyang using images and sounds transmitted by computers. This has launched a brand-new medical service system. In addition, the DPRK has completed the electronic library of Kim Chak University of Technology and the electronic library of Kim Il Sung Comprehensive University. Both libraries are connected to fiber-optic communication networks, linking them to terminals around the country.
A student learns how to drive a tractor on a computer-simulated apparatus
But where exactly North Korea's technology for building its internal information superhighway came from has always been a mystery. South Korea's Herald Economy says building a high-speed communications network is a complex project, so how did North Korea do it? According to the North Korean official media's explanation, this is mainly due to the establishment of the Pyongyang fiber optic communication cable factory, as well as the state's use of modern technology to transform the original communication machinery factories, so that they are able to mass-produce sophisticated, high-performance communication equipment and devices.
The source of high-speed communications network technology is a mystery