BUS-K 201 Lecture Final Study Guide
Chapter 6: The Cloud
The Cloud= no more hard drives
o Uses online storage
The Cloud: the elastic leasing of pooled computer resources over the Internet
The Mainframe Era: 1960s-1980s
Mainframe: large-scale high-speed centralized computers
Mainframe architecture supports connections between a central mainframe and
numerous thin clients/computer terminals
o Thin Clients/Computer Terminals
Screen
Keyboard
Network connection
All applications, data, and processing power were located on the mainframe
Personal computers = stand-alone clients
When organizations buy servers to host their Web sites and data, it is called in-house
hosting
A client-server architecture allows clients/users to send requests across the Internet to
servers
Client-server architecture was more appealing to organization than mainframes because
servers were less expensive
Servers are more scalable, or easily able to respond to incremental growth in demand,
than mainframes because their incremental cost is lower
The client-server architecture allows users to access systems from anywhere in the
world as long as they had an Internet connection
Mainframes didn’t entirely go away with the advent of the client-server architecture.
Cloud computing architecture allows employees and customers to access
organizational data and applications located in the cloud.
Organizations shifted to the cloud for some of the same reasons they shifted to a client-
server architecture— reduced costs and improved scalability.
Elastic: leased computing resources can be increased or decreased dynamically,
programmatically, in a short span of time, and organizations pay for only the resources
they use.
Elasticity doesn’t equal scalability
o Scalability = incremental
o Elasticity = responds to immediate demand
Pooled: different organizations use the same physical hardware, so they share that
hardware through virtualization
Virtualization technology enables the rapid creation of new virtual machines
Chapter 6: The Cloud
The Cloud= no more hard drives
o Uses online storage
The Cloud: the elastic leasing of pooled computer resources over the Internet
The Mainframe Era: 1960s-1980s
Mainframe: large-scale high-speed centralized computers
Mainframe architecture supports connections between a central mainframe and
numerous thin clients/computer terminals
o Thin Clients/Computer Terminals
Screen
Keyboard
Network connection
All applications, data, and processing power were located on the mainframe
Personal computers = stand-alone clients
When organizations buy servers to host their Web sites and data, it is called in-house
hosting
A client-server architecture allows clients/users to send requests across the Internet to
servers
Client-server architecture was more appealing to organization than mainframes because
servers were less expensive
Servers are more scalable, or easily able to respond to incremental growth in demand,
than mainframes because their incremental cost is lower
The client-server architecture allows users to access systems from anywhere in the
world as long as they had an Internet connection
Mainframes didn’t entirely go away with the advent of the client-server architecture.
Cloud computing architecture allows employees and customers to access
organizational data and applications located in the cloud.
Organizations shifted to the cloud for some of the same reasons they shifted to a client-
server architecture— reduced costs and improved scalability.
Elastic: leased computing resources can be increased or decreased dynamically,
programmatically, in a short span of time, and organizations pay for only the resources
they use.
Elasticity doesn’t equal scalability
o Scalability = incremental
o Elasticity = responds to immediate demand
Pooled: different organizations use the same physical hardware, so they share that
hardware through virtualization
Virtualization technology enables the rapid creation of new virtual machines
