WEEK 10(CABLING)

 LAN Techonology Cabling :

    a) Cable is the medium through which information usually moves from one network device to another.

    b) Several types of cable are commonly used with LANs.

    c) In some cases,a network will utilize only one type of cable, other networks will use a variety of cable        types.

Types of Cables :

  

    Unshielded Twiested Pair (UTP) cable

    Shielded Twisted Pair (STP) cable

    Coaxial Cable

    Fiber Optic Cable

    Wireless LANs

Twisted-pair cable :

It comes in two forms which is shielded and unshielded cable. As we know, there are two category of transmission media which is bounded and unbounded media and twisted-pair cable is on the bounded categories same goes to coxial cable and fibre-optic cable.

Bounded

Current : UTP, STP and Coxial Cable

Light : Fibre-optic Cable

 Unshielded Twisted Pair (UTP) cable

             

~ suitable for transmitting both data and voice.

~ consists of two conductors (usually copper).

~ help to eliminate and reduce the impact of noise.

~ cheap, flexible and easy to install.

~ connector : RJ-45 connector.

•     Category 1 : Voice 9wayar Telefon)
•     Category 2 : Data to 4 Mbps (Local Talk)
•     Category 3 : Data to 10 Mbps (Ethernet)
•     Category 4 : Data to 20 Mbps (16 Mbps Token Ring)
•     Catogory 5 : Data to 100 mbps (Fast Ethernet)

 The standard connector for unshielded twisted pair cabling is an RJ-45 connector

Shielded Twisted Pair (STP) cable

             

~ wrapped in a foiled shielding.

~ help provide more reliable datacommunication.

~ prevents and eliminate crosstalk.

~ networj using Token Ring.

~ more expensive.

Coaxial cable

            

 ~   a single copper conductor at its center

 ~ a plastic layer provides insulation

 ~   the metal shield helps to block interference

      (fluorescent light, motors and others)

 ~   Bayone-Neill-Concelman (BNC) connector

 ~ T-connector, barrer connector, terminator

 Fibre Optics

             

 ~ consists of a center glass core surrounded by several layers

 ~ transmit light rather than electronic signals

 ~ eliminate the problem of electrical interference

 ~ transmit signals over much longer distances than coaxial and twisted pair

    carry information at vastly greater speeds.