3.2.2 UTP (Unshielded Twisted Pair) / STP (Shielded Twisted Pair)
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In recent years, most workstation connectivity (and some server connectivity) has been accomplished with twisted pair cabling either UTP (unshielded twisted pair) or STP (shielded twisted pair). It is easier to work with, generally less expensive today, and supports higher speeds (up to 1gbit/sec) than the coax Thicknet and Thinnet approaches.
STP is typically used for Token Ring network cabling and UTP for twisted-pair Ethernet.
In Ethernet networks, twisted pair cables with RJ-45 jacks (8-wire connectors that look like large RJ-11 telephone jacks) are used to connect computers with hubs or switches, which connect together into local area networks. Twisted pair can be used to wire 10BaseT (10mbit/sec), 100BaseTX (100mbit/sec) and 10000BaseT (1gbit/sec) networks.
Common physical cable standards are Cat3 (up to 10Mbt/sec in Ethernet), Cat5 (100mbit/sec), Cat5e and Cat7 (up to 1000Mbit/sec)
In Token Ring networks typically found in organizations whose technology is IBM-based, Type 1 STP cables are normally used to connect computers to the network.
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