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The Twin-stranded Wires In The Local Area Network
- Jul 30, 2018 -

unshielded twin-stranded wires (UTP) and shielded twin-stranded wires (STP). The outside of the STP is covered by a layer of metal material to reduce radiation and prevent information from being eavesdropped. UTP has no metal shielding material, only one layer of insulating rubber package, relatively cheap price, flexible network. In general, we use UTP except for some special occasions (such as severe electromagnetic radiation and high transmission quality requirements) when STP is used in wiring. The UTP now in use can be divided into three, four, five, and more than five categories. Among them, 3 types of UTP meet the requirements of Ethernet (10Mbps) for transmission media, which is an important transmission medium in the early network. The 4 utps are generally less used because the standard is later than 3 utps, and the transmission performance is not much improved compared with 3 utps. Five utps are the preferred medium for fast Ethernet (100Mbps) due to their low price and high quality. Over five utps are used in gigabit Ethernet (1000Mbps)