CH 6 Flashcards
IEEE LAN protocols always start with the numbers 802.
T/F
True
Which of the following is a function of an ISP?
It serves as a gateway to the Internet.
A domain name is a worldwide-unique name that is affiliated with a public IP address.
T/F
True
Cloud-based hosting is the ideal choice for organizations that are required by law to have physical control over their data.
T/F
False
A computer network is a collection of computers that communicate with one another over transmission lines or wirelessly.
T/F
True
An Internet is a network of networks that connects LANs, WANs, and other internets.
T/F
True
The term ________, used to describe the cloud, means that the computing resources leased can be increased or decreased dynamically and that organizations only pay for the resources they use.
elastic
As DSL signals interfere with telephone signals, DSL data transmission and telephone conversations cannot occur simultaneously.
T/F
False
The abbreviations k, M, and G have the same meaning for computer memory as they have for communication speeds.
T/F
False
“https” is the secure version of “http.”
T/F
True
Q1: Why Is the Cloud the Future for Most
Organizations?
- Elastic leasing of pooled computer resources over the Internet.
- Flexibility for unpredictable demand while limiting financial risks. (dynamic)
- Cloud resources are pooled
- Benefit from economies of scale
What does elastic mean?
Leased computing resources quickly increased or decreased dynamically, programmatically, organizations only pay for resources used
What does it mean cloud resources are “pooled”
– Many different organizations share same physical
hardware through virtualization.
What are the advantages of the Cloud
–Cheap processors, data communication, data storage nearly free.
– Virtualization technology enables near instantaneous creation of new virtual machine.
– Internet-based standards enable cloud-hosting vendors to provide flexible, standardized processing capabilities
When Does the Cloud Not Make Sense?
When, by law or standard industry practice, required to have physical control over its data
• Financial institution might be legally required to maintain physical control over its data.
What Network Technology Supports the Cloud?
Local Area Network (LAN)- computer connected at physical site
Wide Area Network (WAN)- Computers connected btwn 2+ separate sites
The Internet & Internets- Network of Networks
Abbreviations Used for Communications and Computer Memory Speeds Differ.
NOT THE SAME AS MEMORY!
k-1000
M- 1,000,000
G- 1,000,000,000
What is TCP/IP protocol?
rules and data structures governing communications through the Internet
What does an Public IP Address do?
- Identifies particular device on public Internet.
- Public IP addresses unique, worldwide.
- Assignment controlled by ICANN (Internet Corporation for Assigned Names and Numbers).
What does a Private IP Address do?
Identifies particular device on a private network.
What is a domain name?
– Worldwide-unique name affiliated with a public IP address.
– Affiliation of domain names with IP addresses is dynamic.
What about 2024?
Cloud services faster, more secure, easier to use, cheaper.
• Fewer organizations set up own computing infrastructure.
• More pooling of servers across organizations.
• More economies of scale achieved by cloud vendors.
• Individuals, small businesses, large organizations readily
obtain elastic resources at a very low cost
What else about 2024?
Large server farms employing few employees reduces number of small companies that install and maintain in-house email exchange and other servers, and jobs.
• Cheap and elastic cloud services enable new small startups.
• Enable organizations to develop more information systems, cheaply and quickly, and increase demand for employees who know how to use and manage information systems.
