MEDIUM FOR TRASMISSION DATA
ROZANA DIANA AHMAD RUSLI
It consists oftwo wires or conductors twisted together, eachwith its own plastic insulation. Used RJ45 connector
COAXIAL CABLE
COAXIAL CABLE
• consists of a center wire surrounded by insulation and then a grounded shield of braided wire. The shield minimizes electrical and radio frequency interference.
• Coaxial cabling is used by the cable television industry and is also widely used for computer networks, such as Ethernet.
FIBRE OPTIC
• The fibre optic cable is a networking medium that uses light for data
• Its core consists of dozens or hundreds of thin strands of glass or plastic which uses light to transmit signals.
• Each strand, called an optical fibre, is as thin as a human hair.
FIBRE OPTIC
RADIOWAVES / MICROWAVES
Frequencies3 KHz TO 1 GHz
Frequencies1 GHz to 300 GHz
RADIOWAVES MICROWAVES
Frequencies300 GHz TO 400 THz
Frequencies 2400-2480 MHz
Distance10 Meter
Connections are so fast (10 times faster than modem)Internet Satellite : StarBand, Pegasus Express, Teledesic and Tachyon.Satellite used for broadcasting and internet communication
Its MALAYSIA have own satellite???
MODEM
1. To transmit data over telephone or cable line2. Convert data signal :Computer (digital) telephone line (analog)telephone line (analog) Computer (digital)
INTERNALFOR DESKTOP PC
XX
Digital signal Digital signal
Analog signal
Enables the computer to access the network.
Transmit data to correct destination on the network
Allow computers to transfer data.
USB wirelessAdapter
ACCESS POINT
V
HUB / SWITCH
Used to connect computer or devices on LAN (local area network)
HUBSWITCH
Z Z
X
Internet
IDENTIFY THE X,Y Z DEVICES ?
Y
W
Internet
ZZ
X
Y
X
Y
Z
W
X