Chapter 2.1 : Networks and the Internet Flashcards
Individual computers consist of both _______ and _______ .
hardware and software
What are 4 examples of hardware?
input devices
output devices
memory units
central processing units
What are 3 examples of software?
operating systems
utilities
applications
Connecting computers together involves forming _______ ?
networks
How do networks make e-business so interesting?
They open up exciting opportunities for
communication
collaboration
markets
What are the 4 important type of networks?
Local area network (LAN)
Wide area network (WAN)
Virtual private network (VPN)
Internetworks (intranets, extranets, internet)
What is LAN?
Local area network
a network covering a small physical area, such as a small office
What type of network is this:
a network covering a small physical area, such as a small office
LAN
Local area network
What is WAN?
Wide area network
a network that covers a broad geographical area
What type of network is this:
a network that covers a broad geographical area
WAN
Wide area network
What is VPN?
Virtual private network
commonly used to secure communications through the public internet
What type of network is this:
commonly used to secure communications through the public internet
VPN
Virtual private network
Example of internetworks
intranets
extranets
internet
Intranet, extranets and internet belongs to a network called?
internetworks
What are intranets? What is the purpose of it?
private networks that operate within organisations
Purpose:
- restrict access to important or sensitive information
- simplify access to information for employees
What are extranets? what is the purpose of it?
private networks that extend beyond the boundaries of companies to include suppliers, customers and other collaborators.
Purpose:
- to support supply chain management
What is the internet? What can if be understood as according to Chaffey (2009)?
a ‘network of networks’ that enables communication between millions of computers worldwide.
It can be understood as a large client/server system.
Client computers provide? Example?
the interface to human users and perform local processing
Example:
-personal computer at home
What are server computers? Example?
computers dedicated to providing services across the network
Example:
- Email
What are firewalls used for?
to protect the security information flowing over an intranet or extranet
