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NETWORK (ADVANTAGES (• Facilitates communications
– People may…
NETWORK
ADVANTAGES
• Facilitates communications
– People may communicate efficiently and easily via
email, instant messaging, chat, and online social
network.
• Share data and information
– Users can share and access data and information
stored on the network faster and easier.
• Share hardware and software
– Users have 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
– Theft of personal information such as name,
address, and credit card number can easily occur
when users give information on unsecured
websites.
Virus threat
– Users are easily exposed to virus attacks on their
systems when they connect to the Internet.
Pornography
– Internets allows easy access to pornographic
materials which can be detrimental for children
and teenagers
• Social disconnect
– Users addicted to the Internet are drifting apart
from their family and friends.
• Two types of transmission media:
– Physical transmission media (wired)
– Wireless transmission media
Physical transmission media use wire, cable,
and other tangible materials to send
communications signals.
-
• Wireless transmission media send
communications signals through the air or
space using radio, micro wave, and infrared
signals.
-
• Network is a collection of computers and
devices connected together via
communication devices and transmission
media.
• Computers and devices refers to:
– Computers
– Smart phones
– Tablets
– Printers
– Scanners
– ATM machines
– Kiosks
• Communication devices refers to 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 refers to the materials or
substances capable of carrying one or more
signals.
• Examples:
– cable, radio signal, satellite signal