Network Media – Cable The network media is part of the physical layer of a LAN network as defined by the OSI Open Systems Protocol Reference Model, see Table 1. It is the medium through which the information is passed from one device in the network to another. Although wireless methods of relaying information are […]
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Introduction Communications is one of the most dynamically changing industries. We are surrounded by continually evolving, state-of the-art technology (wifi, smart phones, satellite TV, GPS) Advanced methods of communication have filtered into many industries and revolutionized their processes and procedures. Understanding the advantage of utilizing Ethernet communications is important in helping the HVACR industry keep
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Networks The underlying structure of communications is a network. A network consists of two or more computers that are linked together to provide shared access to file servers, printers, or to electronic communications. The computers can be linked through phone lines, cables, satellite, radio waves or infrared light beams. There are two basic types of
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Refrigeration is used to assure proper storage temperature of food products. This is most often accomplished by using the vapor compression cycle. In this technique, refrigerant vapor is compressed by a compressor, condensed into a liquid in a con-denser by the rejection of heat, expanded by a restrictive device, and fed into an evaporator where
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