UTP cable packet inspection

UTP "refers to over unshielded twisted pair (UTP-Unshielded Twisted Pair) and UTP shielded twisted-pair unshielded twisted-pair cable is composed of multiple pairs and a plastic sheath constitute V. category refers to five different quality levels International Electrical Industry Association twisted-pair cable defined in order to let everyone have a twisted pair more comprehensive understanding, we first introduce common types and characteristics of the twisted pair. Computer LAN The twisted-pair unshielded twisted pair can be divided into (UTP) and shielded twisted pair (STP) into two categories: STP outside wrapped by a layer of metallic material to reduce radiation, prevent information from being tapped, but with a more high data transfer rates, but higher prices, the installation is more complicated; UTP no metal shielding material, only a layer of insulating rubber wrapped, relatively cheap, flexible networking, except for some special occasions (such as electromagnetic radiation severely affected, yes. require a higher transmission quality, etc.) using STP wiring outside in, under normal circumstances we are now using UTP UTP use can be divided into three categories, Class 4, five, over five, six, super-six of them..: Class 3 UTP Ethernet adaptation (10Mbps) transmission medium requirement is an important early network transmission medium; UTP Category 4 to 3 due to the introduction of standard class late, and transmission performance compared with the three types of UTP and not much improve , it is generally less use; Cat5 UTP due to inexpensive high quality and become Fast Ethernet (100Mbps) is the preferred medium; Category 5 UTP comes in Gigabit Ethernet (1000Mbps).