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Chapter 1
Planning a Network Topology
Case Scenario Exercise
Litware Inc., a manufacturer of specialized scientific software products, is
expanding its
operation into a new city and has purchased an office building there. The
building will
house the inside and outside sales forces for the city and the surrounding
area, as well
as the company’s primary research and development facility. You have been
assigned
the task of designing the data network for the new office.
The office building is a three-story brick structure built in the late
1940s. The heating
plant is original to the building, although central air conditioning was
added in the
1970s. Before being purchased by Litware, each floor of the building was
leased to a
series of different tenants, many of whom restructured the internal floor
plan to suit
their own needs. As a result, the layout of each floor is substantially
different from the
others, and the existing cabling systems are completely separate from each
other. The
previous tenants have left their cables in place, along with the wall plates
and the patch
panels, but they have taken all other networking equipment with them.
The Realtor showing the building was able to provide a basic floor plan for
each of the
three stories. The current state of the three floors is as follows:
■
First floor This floor recently housed an accounting firm, and consists of
ten
individual offices. These offices are currently wired with Category 5 UTP
cable for
telephone and data connections.
■
Second floor At the time of the building’s sale, this floor housed a
telemarketing
firm. The floor consists of a single large room filled with cubicles, which
are wired
with Category 3 UTP cable for both telephone and data connections.
■
Third floor This floor housed the offices of a graphic design company and,
to
accommodate its high bandwidth needs, has been wired with multimode fiber-
optic cable.
Your task is to design a network for the building that can support the
following facilities:
■
An inside sales department that is basically a call center, where employees
receive
telephone calls from potential customers. These employees use their
workstations
to enter caller information into a customer database, take orders for
merchandise,
and provide product information, both over the phone and by mail.
■
An outside sales department, which consists of personnel who travel to the
sites of
potential customers in the area to provide product information, negotiate
terms,
and furnish pre-sales technical support. These salespeople also need access
to
facilities where they can meet with potential customers visiting the Litware
build-
ing. The computing needs of the outside sales staff include access to the
com-
pany’s customer database, the ability to run presentation software in the
office and
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