Mạng và viễn thông P33

Practical Network Transmission Planning Transmissionmedia exist to convey information across networks. No matter what form the information takes (be voice, video,data, or some other form), the prime requirement that the it is information received atthedestinationshouldas closelyaspossiblematch that originally transmitted. The signal should be free from noise, echo, interference and distortion, and should be of sufficient strength (or volume) asto be clearly distinguishable by the receiver. The reliability of the service is also important. ...