Chapter 3: Internet Technology (Client/Server • A network in which one or…
Chapter 3: Internet Technology
• Computers and devices refers to:
– Smart phones
– ATM machines
– Kio sks
• Communication devices refers to any hardware that transmits data, instructions, and information between a sending device
and a receiving device.
– Network Cards, Modems, Wireless Access Points, Routers, Hubs and Switches .
• Transmission media refers to the materials or
substances capable of carrying one or more
– cable, radio signal, satellite signal
• Two types of transmission media:
– Physical transmission media (wired)
– Wireless transmission medi a.
• Physical transmission media use wire, cable,
and other tangible materials to send
– 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
• Examples of wireless signals:
– radio waves
Advantages of Network
• 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 easie r.
• 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 of Network
• 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.
– Internets allows easy access to pornographic
materials which can be detrimental for children and
• Social disconnect
– Users addicted to the Internet are drifting apart
from their family and friend s.
• Network is a collection of computers and devices connected together via communication devices and transmission media
Network architecture refers to the design of
computers, devices, and media on the network .
Types of Network Architecture
• Peer-to-Peer (P2P)
• A network in which each computer (called peer)
have equal capabilities and responsibilities to
share hardware, data or information with other
computers on the network.
• Each computer stores files on its own storage
• Suitable for small network where high level
security is not necessary.
• Some OS, such as Windows, include a peer-topeer networking utility that allows users to set up
a peer-to-peer network.