Wednesday, 27 December 2017

Computer Network

WHAT IS NETWORK 

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



WHAT IS COMMUNICATION DEVICE ??

Any type of hardware capable of transmitting data, instructions, and information between a sending device and receiving device.

TYPES OF COMMUNICATIONS DEVICES


  • Dial-up Modem
  • Digital modem (ISDN, DSL and Cable Modem
  • Wireless modem
  • Wireless access point
  • Router
  • Switch
  • Hub
WHAT IS TRANSMISSION MEDIA ??

 Materials or substances capable of carrying one or more signals in a communications channel.



PHYSICAL TRANSMISSION MEDIA 




WIRELESS TRANSMISSION MEDIA



ADVANTAGES AND DISADVANTAGES OF NETWORK




















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