Page 274 - Using MIS

242 Chapter 6 The Cloud

aCtive review

Use this Active Review to verify that you understand the ideas and advantages of a CDN. Explain how Web services can be
and concepts that answer the chapter’s study questions. used internally.

Q1 Why is the cloud the future for most Q5 How can AllRoad Parts use the cloud?
organizations?
First, state why AllRoad is likely to use the cloud. Name and
Define cloud and explain the three key terms in your defini- describe SaaS products that AllRoad could use. Explain several
tion. Using Figure 6-3 as a guide, compare and contrast cloud- ways that AllRoad could use PaaS offerings. Summarize why it
based and in-house hosting. Explain three factors that make is unlikely that AllRoad would use IaaS.
cloud computing possible today. When does it not make sense
to use a cloud-based infrastructure? Q6 How can organizations use cloud
services securely?
Q2 What network technology supports
the cloud? Explain the purpose of a VPN and describe, in broad terms,
how a VPN works. Define the term virtual and explain how
Define computer network. Explain the differences among it relates to VPN. Define private cloud. Summarize why the
LANs, WANs, intranets, internets, and the Internet. Describe benefits of a private cloud are questionable. What kind of or-
protocol and explain the purpose of protocols. Explain the key ganization might benefit from such a cloud? Explain why it is
distinction of a LAN. Describe the purpose of each component unlikely that even very large organizations can create private
in Figure 6-5. Define IEEE 802.3 and 802.11 and explain how clouds that compete with public cloud utilities. Under what
they differ. List three ways of connecting a LAN or computer to circumstance might a private cloud make sense for an organi-
the Internet. Explain the nature of each. zation? Define VPC and explain how and why an organization
might use one.
Q3 How does the cloud work?
Explain the statement, “The Internet is an internet.” Define IP Q7 2025?
address and explain the different ways that public and private IP
addresses are used. Describe the purpose of a domain name and What is the likely future for the cloud? Summarize the good
explain how such names are associated with public IP addresses. and bad news that the cloud brings. Explain why the photo
Explain the role for agencies like Go Daddy. Define URL. in Figure 6-2 is disturbing. Explain the statement, “The cloud
Define three-tier architecture and name and describe the lifts all boats.” Describe three categories of remote action sys-
role of each tier. Explain the role of each tier in Figure 6-10 as tems. Explain how remote systems will increase the value of
well as how the pages in Figures 6-9 and 6-11 are processed. super-experts but diminish local mediocrity. What can other-
Using the department analogy, define SOA and explain why than-super-experts do? Summarize how this 2025 discussion
departments are encapsulated. Summarize the advantages of pertains to your career hopes.
using SOA in the three-tier architecture.
Define TCP/IP protocol architecture and explain, in gen- using Your Knowledge
eral terms, the purpose of http, https, smtp, and ftp. Define the with allroad parts
purpose and role of WSDL, SOAP, XML, and JSON. State a key Name the principal advantage of the cloud to AllRoad Parts.
difference between XML and JSON.
For hosting its Web site, which cloud offering—SaaS, PaaS,
Q4 How do organizations use the cloud? or IaaS—makes the most sense, given the size and nature of
AllRoad’s business? Explain how AllRoad could use that offer-
Define SaaS, PaaS, and IaaS. Provide an example of each. For ing. If AllRoad were larger and employed a more sophisticated
each, describe the business situation in which it would be the IT staff, name another alternative that would make sense.
most appropriate option. Define CDN and explain the purpose Explain why.