week 7- CABLE

CABLE.....

LAN Technology  Cabling
A wireless LAN or WLAN is a wireless local area network, which is the linking of two or more computers without using wires. LAN utilizes spread-spectrum based on radio waves to enable communication between devices in a limited area, also known as the basic service set.

Types Of Cables

1)    Unshielded Twiested Pair (UTP) cable

2)   Shielded Twisted Pair (STP) cable

3)   Coaxial Cable

4)  Fiber Optic Cable

5)   Wireless LANs

 

UNSHIELDED TWISTED PAIR (UTP) CABLE

 

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

-RJ stands for REGISTERED JACK, implying that the connector follows a standard borrowed from the telephone industry. This standard designates which wire goes with each pin inside the connector.

SHIELDED 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

The most common type is called barrel connector because of its shape. Coaxial connectors are familiar from cable TV and VCR hook-ups, which employ both threaded and slip-on styles.



FIBRE OPTICS

-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.

 WIRELESS LANS

-Wireless telecommunications is the transfer of information between two or more points that are not physically connected.