Table of Contents
Module 1 - Identify Customer Needs
Section 2 - Extract New Customer Requirements
CareTaker Publication: Solution
1. On a separate sheet of paper, diagram the packet
flow of information for the new e-mail system. In the
following space write
down any open issues or follow-up questions regarding the e-mail system.
Some open questions about the e-mail system are as follows:
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When the users retrieve their mail, do they send mail also?
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When they send mail, does the mail go to the local server first?
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How are new users added to the system? Do new users create traffic on the
WAN?
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When the servers update each other, do they send one query to get new mail
and one query to send new mail?
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If you are an expert on electronic mail systems, you might think of additional
questions.
2. On a separate sheet of paper, diagram the packet
flow of information for the TN3270 application.
In the following space
write down any open issues or follow-up questions regarding the TN3270
system.
3. On a separate sheet of paper, diagram the packet
flow of information for the new office
productivity application.
In the following space write down any open issues or
follow-up questions regarding
the productivity application.
4. List the customer's performance requirements
and constraints.
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The network in the new building must be fully installed and tested
before the move.
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The new corporate link must be tested before the move of the ES9000 to
test the IP routing for e-mail and Internet access.
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The servers should be centrally located in the computer rooms for administration
and security.
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Because the company’s publication data is collected and maintained on an
IBM ES9000 system, we can assume that the TN3270 traffic is critical. Verify
that TN3270 traffic is critical.
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It does not appear that there are any unusual or demanding performance
requirements other than the load of 113 office application and e-mail users.
5. What concerns do you have for scalability if
the number of users were to double over the next year?
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With proper segmentation in the design, there should be no problem with
growth. The implementation of five servers will allow traffic to be segmented
for file and print sharing. The TN3270 traffic is significant but should
be segmentable because 97 of the users are primarily terminal users and
light file and print users. We do not know how heavy their use of e-mail
will be, so we must consider that it may be heavy.
6. The manager of Warehouse and Distribution is
concerned about PC performance over a leased line.
What design constraints
and consideration will be taken into account for these concerns?
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Speed of the leased line.
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Selection of network computer (diskless workstations) technology for the
warehouse systems.
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