COMMUNICATION DEVICE -HARDWARE COMPONENT THAT ENABLES A COMPUTER  TO SEND AND RECEIVE DATA, INSTRUCTIONS, INFORMATIONS TO AND FROM ONE OR MORE COMPUTERS	EXAMPLES	FUNCTION
	MODEM	DEVICE THAT ENABLES A COMPTER TO COMMUNICATE OVER ANALOG NETWORKING MEDIA
	ROUTER	DEVICE THAT CONNECT MULTIPLE NETWORK TOGETHER
	HUB	DEVICE THAT PROVIDES COMMON CENTRAL CONNECTION POINT FOR NODES ON NETWORK
	SWITCH	DEVICE USED TO CONNECT MULTIPLE DEVICES ON A SINGLE NETWORK
	NETWORK INTERFACE CARD	AN ADAPTER CARD THAT CONNECT A COMPUTER TO A NETWORK

TRANSMISSION MEDIA : THE MATERIALS OR SUBSTANCE CAPABLE OF CARRYING ONE OR MORE SIGNALS

PHYSICAL: SEND SIGNALS THROUGH CABLE, WIRE OR TANGIBLE MATERIALS	COAXIAL CABLE
	FIBER OPTIC
WIRELESS: SEND SIGNALS THROUGH THE AIR OR SPACE	INFRARED
	MICROWAVES