North Korea is still developing rapidly in recent years, and according to a report by the Global Times, North Korea has its own network called Brightnet, which is a kind of domestic local area network (LAN), though it doesn't connect to the Internet. The content of this network includes political, economic and other aspects of knowledge, as early as 2000 North Korea completed some of the construction of the network, and put it into use, domestic users through the telephone branch for access to the network, the main role is to allow the people of their own country to receive official news, download related information and so on.
But the source of the technology used by North Korea to build its internal network remains unknown, as it is a complex project that, according to outside estimates, the country doesn't seem to have the capacity to undertake. In the face of these suspicions, the official explanation given by the DPRK is that this is due to the establishment of the Pyongyang Fiber Optic Communication Cable Factory, which enabled them to independently produce high-performance communication devices and equipment, and ultimately facilitated the completion of the internal network.
People's hospitals in nine provinces across North Korea have already implemented 100M fiber-optic communications, which can send and receive audio and video message communications. The most famous Kim Man-u Hospital in Pyongyang is networked with local hospitals such as the People's Hospital of North Pyongan Province and Mangyongdae District through optical fiber. Excellent medical specialists in Pyongyang can treat and manage the health of patients across the country using images and sounds transmitted by computers, which initiated a brand-new medical service system.
North Korea may have succeeded with technology provided by South Korea. In 2009, South Korea had provided North Korea with technology and equipment to help it lay a fiber-optic network near the demilitarized zone and connect it to the South to support cooperation projects at the Kaesong Industrial Park, and also used it to help the two militaries communicate as necessary. After the deterioration of North-South relations, South Korea cut off the connection with the North's fiber-optic network.