The training manual describes the principles of building information networks based on the IPv4 protocol, as well as building an organization's cable network using modern types of optical and copper cables, wireless technologies. Methods for mastering practical skills necessary for installation of optical cable, twisted pair cable, setting up wireless devices of information network are given. The material is prepared on the basis of modern international standards in the field of telecommunications, contains a large number of drawings, diagrams, as well as a training methodology.