The smart indication model that calculates amount of electromagnetic radiation absorbed by the human body when using a mobile device

A computer network is a group of computers connected to each other through a communication channel. A channel provides data transfer in a network, i.e. data transfer between computers in a given group. A network can consist of two or three computers or connect several thousand PCs, data transfer between computers can be carried out over a special cable, fiber optic cable or twisted pair. Network hardware and hardware and software help connect computers in a network and ensure their communication. Considering the properties of the secondary level of the ISO/OSI reference model and its traditional definition, one can see this. This trend belongs to the main part of the properties. The link layer provides reliable data transmission over a physical channel. Specifically, it deals with issues. In fact, the functionality defined by the link layer of the OSI model serves as a platform for some of today's most powerful technologies. The great importance of Layer 2 functionality is highlighted by the fact that equipment manufacturers continue to invest heavily in the development of devices with such functionality, such as switches