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1-46
Chapter 1
Planning a Network Topology
3. What negative result can occur when you connect an enterprise server to a
hori-
zontal network?
The horizontal network on which the server is located can be overloaded with
traffic from all the
other horizontal networks.
Page
Case Scenario Exercise
1-39
1. Specify which floor of the building is best suited for each of the three
departments
listed and give your reasons why.
The first floor is best suited to the outside sales department, because it
provides individual
offices for the salespeople’s meetings, and because it is wired with
Category 5 cable, providing
the potential for more bandwidth to support more elaborate applications
required by the users.
The second floor is best suited to the inside sales call center, because it
already has cubicles
in place that are wired with Category 3 UTP. This cable supports a 10Base-T
network, which is
sufficient for the users’ needs. The third floor is best suited to the
research and development
department, because the fiber-optic cable provides the combination of high
bandwidth and
security that these users need.
2. Which of the three departments to be housed in the new building could
best make
use of a wireless network medium? Why?
The outside sales department could best make use of a wireless network
medium, because
the salespeople use portable computers. A wireless network would enable them
to access net-
work resources from any location in their department.
3. Which of the three floors has the most secure cable installation at the
present time?
Why?
The third floor is currently the most secure, because it uses fiber-optic
cable, which cannot eas-
ily be tapped.
4. Assuming that you plan to use Ethernet throughout the building, which
variant
would you use on each floor? Why?
The Category 5 UTP cable on the first floor supports 100Base-TX Fast
Ethernet, which is the
current standard for horizontal Ethernet networks. The Category 3 UTP cable
installed on the
second floor network can’t support Fast Ethernet, so you must use 10Base-T
Ethernet. The
fiber-optic cable on the third floor supports 100Base-FX Fast Ethernet,
providing sufficient
bandwidth for the R&D users.
5. Apart from the computers themselves, what connectivity components must
Lit-
ware install on each of the three networks in the building to make it a
functioning
Ethernet network?
Each network requires installation of a hub to make it a functioning
Ethernet LAN.
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