LANs is the type of several types of cable are commonly used.
there are 5 types of cables, which is:
- Unsheilded Twisted Pair (UTP) cable
- Sheilded Twisted Pair (STP) cable
- Coaxial cable
- Fibre Optic cable
- Wireless LANs
usually, UTP, STP and Coaxial Cable are transmitted with the electric. but, Fibre Optic Cable and Wireless LANs are transmitted by light.
Unsheilded Twisted Pair (UTP) cable
- 4 pairs of wires inside the jacket
- each pair is twisted with a different number of twisted per inch
- 5 categories:
- category 1 : voice ( telephone wire)
- category 2 : data to 4Mbps (local talk)
- category 3 : data to 10Mbps (ethernet)
- category 4 : data to 20Mbps (16Mbps token ring)
- category 5 : data to 100Mbps (fast ethernet)
- standard connector is an RJ-45 connector
- disadvantage of UTP : may be susceptible to radio and electrical frequency interference
Sheilded Twisted Pair (STP) cable
- consist of tw0 individual wires wrapper in a foil shielding-help provide a more realiable data communication
- suitable for environments with electrical interference.
- extra shielding can make the cables quite bulky
Coaxial cable
- has a single copper conductor at its center
- a plastic layer provides insulation between the center conductor and a braided metal shield
- the metal shield helps to block any outside interference from fluorescent lights,motors, and other computers.
- coaxial cable connector:
- Bayone-Neill-Concelman (BNC) connector
- different types of adapters are available for BNC connectors, including:
- T-connector
- barrel connector
- terminator
Fibre Optic
- consists of a center glass core surrounded
- transmits lightrather than electronic signals eliminating the problem of electrical interference.
- large amount of electrical interference
- able to transmit signals over much longer distances than coaxial and twisted pair.
