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3.1.1 Basic Concept of Network (Advantages (Facilitates communications,…
3.1.1 Basic Concept of Network
a collection of computers and
devices connected together via
communication devices and
transmissionmedia.
Communication devices
any
hardware that transmits data, instructions,
and information between a sending device
and a receiving device.
Examples
Network Cards, Modems, Wireless Access Points,
Routers, Hubs and Switches
Transmission media
the materials or
substances capable of carrying one or more
signals
Examples
– cable, radio signal, satellite signal
types
– Physical transmission media (wired)
use wire, cable,
and other tangible materials to send
communications signals.
Examples
-Twisted-pair cable
– Coaxial cable
– Fiber-optic cable
Wireless transmission media
send
communications signals through the air or
space using radio, micro wave, and infrared
signals.
Examples
– infrared
– radio waves
– microwaves
Advantages
Facilitates communications
communicate efficiently and easily via
email, instant messaging, chat, and online social
network
Share data and information
can share and access data and information
stored on the network faster and easier
Share hardware and software
access to hardware and software on
the network, thus users can save cost on
hardware and software.
Transfer fund
Electronic Fund Transfer (EFT) allows users to
transfer money between accounts more
conveniently.
Disadvantages
Theft of personal information
can easily occur
when users give information on unsecured
websites
Virus threat
easily exposed to virus attacks on their
systems when they connect to the Internet.
• Pornography
easy access to pornographic
materials which can be detrimental for children
and teenagers
Social disconnect
addicted to the Internet are drifting apart
from their family and friends.