WHAT IS NETWORK?

ABOUT NETWORK

A network is a collection of computers and devices connected together via communications devices and transmission media.

COMMUNICATION DEVICES & TRANSMISSION MEDIA

WHAT IS COMMUNICATION DEVICES? 

A communications device is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device.

TYPE OF COMMUNICATION DEVICES

↠ dial-up modem

↠ digital modem



↠ wireless modem
↠ network card
↠ wireless access point

↠ router
↠ switch 
↠ hub 



WHAT IS TRANSMISSION MEDIA?
Materials or substances capable of carrying one or more signals in a communications channel.
1.Physical transmission media/Guided media/Wired
•Twisted-Pair Cable, Coaxial Cable, Fiber-Optic Cable.

2.Wireless transmission media/Unguided media/ Wireless
•Infrared, Broadcast Radio, Cellular Radio, Microwave, communications satellite.

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