Unshielded Twisted Pair (UTP) Cable:

Figure 1 Unshielded Twisted Pair Cable.

• There are four pairs of wires inside the jacket. Each pair is twisted with a different number of twists per inch to help eliminate interference from adjacent pairs and other electrical devices.
• The tighter the twisting, the higher the supported transmission rate and the greater the cost per foot.
• Most common and widely used.
• Best option for school networks.

Categories of unshielded twisted pair cable :

• The EIA/TIA (Electronic Industry Association/Telecommunication Industry Association) has established standards of UTP and rated six categories of wire.

Category           Speed             Use
      1                   1 Mbps            Voice Only  (Telephone Wire)
      2                  4 Mbps           LocalTalk & Telephone (Rarely used)
      3                  16 Mbps           10BaseT Ethernet
      4                 20 Mbps           Token Ring (Rarely used)
      5                 100 Mbps (2 pair) 100BaseT Ethernet

Unshielded Twisted Pair Connector:

Figure 2 shows RJ-45 connector

         An RJ-45 connector is the standard connector for unshielded twisted pair cabling. It is a plastic connector that looks like a large telephone-style connector. Home telephone always has a slot allows the RJ-45 to be inserted only one way. RJ stands for Registered Jack, implying that the connector follows a standard borrowed from the telephone industry. This standard designates which wires are go with each pin inside the connector.

        Here have an example of UTP cable on great explanation and these videos has cover the process of terminating unshielded twisted pair cable, usually called "Cat 5" but including Categories 5, 5E, 6 and 6A for different performance grades. Futhermore , these cables are used in many local area networks (LANs) as well as in building management systems, security systems and short CCTV . Hope you guys enjoy this video as well!