Category 5 cable commonly known as Cat5 is a twisted pair cable used for carrying information signals from one end to other in the network. It is applied in structured cabling for computer networks mainly Ethernet. Cable standard provides data rate of up to 100 MHz, which is suitable for most varieties of Ethernet traffic over twisted pair cables. Telephony and Video Signals are also carried by Cat5.
This cable is commonly connected with the use of punch down blocks and modular connectors. Most Cat5 cables are unshielded, dependent upon balanced line twisted pair design and differential signaling for noise cancellation. The cable is offered in both stranded and solid conductor forms, Stranded form is very flexible and tolerate more bending without breaking than Solid form. Permanent wiring (wiring inside the wall which connects a wall socket to the central patch panel) is a solid-core, whereas patch cables (movable cable that plugs into wall socket at one end and a computer at the other end) are stranded.
Cat5 is used in structured cabling for a computer networks like Ethernet over twisted pair. Cat5 cable standard provides data rate of up to 100 MHz which is most appropriate for 10BASE-T (Ethernet), 100BASE-TX (Fast-Ethernet), and sometime also for 1000BASE-T (Gigabit-Ethernet). 10BASE-T and 100BASE-TX Ethernet connections require four wires that is two pairs. 1000BASE-T Ethernet connections require eight wires four pairs. With the use of (PoE) Power over Ethernet, up to 25 watts of power can be transmitted through the cable to Ethernet data as well.
Cat5 has a attenuation length of 100m, exceeding this length without the use of bridge or repeater could cause network issues including loss of SNR. The picture shows a CAT5 cable with RJ45 connector and other end of the cable with each of the wires it comprises.