Wednesday, 3 January 2018

COMPUTER NETWORK


NETWORK
Collection of computer and devices connected together via communication device and transmission media



TRANSMISSION MEDIA & COMMUNICATION DEVICE
TRANSMISSION MEDIACOMMUNICATION DEVICE
Materials or substances capable of carrying one or more signals in a communications channel.Any type of hardware capable of transmitting data, instructions and information between a sending device and receiving device.




TYPE OF TRANSMISSION MEDIA & COMMUNICATION DEVICE
TRANSMISSION MEDIACOMMUNICATION DEVICE
*Physical transmission (Twisted pair cable, Coaxial cable, Fiber optic cable)*Dail up modem
*Wireless transmission (Infrared, Broadcast radio, Cellular radio, Microwave, Communication satelite)*Digital modem
*Wireless modem
*Network card
*Wireless access point
*Router
*Switch
*Hub


ADVANTAGES & DISADVANTAGES OF NETWORK
ADVANTAGEDISADVANTAGE
*Easy communication and speed*Breakdowns and possible loss of resources
*Ability to share files, data and information*Epensive to build
*Sharing hardware*Security threats
*Sharing software*Bandwidth issues
*Security
*Speed

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