XYZ Corporation Partial Network Diagram
You are the network engineer for XYZ Corporation whose partial network diagram appears above. As
diagrammed, XYZ Corporation has two branch offices separated by a Windows Server 2003 router with
three interfaces. One interface connects directly to the Internet and has a public IP address of 24.5.6.7.
One interface connects to Branch 1 and the other interface connects to Branch 2. Branch 1 and Branch 2
are of approximately the same size. Each branch currently has 500 hosts; however, you should allow for
the size and number of hosts to double.
You are tasked with implementing a DHCP solution that includes fault tolerance, minimizes costs, and
does not use the 10.0.0.0 address space. Based on the above diagram, your superiors have proposed four
different solutions for implementing DHCP based on this scenario. These solutions appear below:
1. Use a private 192.168.0.0/20 address space. Add DHCP to Server A in Branch 1 and to Server D
in Branch 2. Assign scopes based on the 50/50 rule. On Server A, create a scope called Branch1
that starts with 192.168.16.1 and ends with 192.168.24.254. On Server D, create a scope called
Branch2 that starts with 192.168.32.1 and ends with 192.168.40.254. For fault tolerance, create a
second scope on Server A called Branch2 that starts with 192.168.41.1 through 192.168.47.254.
Create a second scope on Server D called Branch1 that starts with 192.168.25. 1 through
192.168.31.254. On the router configure a DHCP Relay Agent as appropriate.
2. Use a private 172.16.0.0/22 address space. Add DHCP to Server A in Branch 1 and to Server D in
Branch 2. Assign scopes based on the 80/20 rule. On Server A create a scope called Branch1 that
starts with 172.16.4.1 and ends with 172.16.6.254. On Server D create a scope called Branch2
that starts with 172.16.8.1 and ends with 172.16.10.254. For fault tolerance, create a second scope
on Server A called Branch2 that starts with 172.16.7.1 through 172.16.7.254. Create a second
scope on Server D called Branch1 that starts with 172.16.11.1 through 172.16.11.254. On the
router configure a DHCP Relay Agent as appropriate.
3. Use a private 172.16.0.0/21 address space. Add DHCP to Server A in Branch 1 and to Server D in
Branch 2. Assign scopes based on the 80/20 rule. On Server A create a scope called Branch1 that
starts with 172.16.8.1 and ends with 172.16.14.254. On Server D create a scope called Branch2
that starts with 172.16.16.1 and ends with 172.16.22.254. For fault tolerance, create a second
scope on Server A called Branch2 that starts with 172.16.23. 1 through 172.16.23.254. Create a
second scope on Server D called Branch1 that starts with 172.16.15. 1 through 172.16.15.254. On
the router configure a DHCP Relay Agent as appropriate.
4. Use a private 172.16.0.0/21 address space, add DHCP to Server A in Branch 1. On Server A
create a scope called Branch1 that starts with 172.16.8.1 and ends with 172.16.15.254. Add an
exclusion starting with 172.16.12.1 and ends with 172.16.15.254. For fault tolerance, add a
second scope to Server A in Branch 1 called Branch 2BU that starts with 172.16.16.1 and ends
with 172.16.23.254. Add an exclusion starting with 172.16.16.1 and ends with 172.16.20.254.
Still using a private 172.16.0.0/21 address space, add DHCP to Server D in Branch 2. On Server
D create a scope called Branch 2 that starts with 172.16.16.1 and ends with 172.16.23.254. Add
an exclusion starting with 172.16.21.1 and ends with 172.16.23.254. For fault tolerance, add a
second scope to Server D in Branch 2 called Branch 1BU that starts with 172.16.8.1 and ends
with 172.16.15.254. Add an exclusion that starts with 172.16.8.1 and ends with 172.16.11.254.
On the router configure a DHCP Relay Agent as appropriate.
Answer the following questions regarding this scenario:
1. Define this problem in your own words.
2. Compare and contrast the four proposed solutions.
3. Select one of the proposed solutions that you feel is most appropriate for this situation and defend
your choice.
4. Describe any weaknesses in your selected solution.
5. Make suggestions on ways to improve/strengthen your solution. You may include information
not described in the scenario above.
6. Reflect on your own thought process after completing the assignment.
a) “What did you learn from this process?”
b) “What would you do differently next time to improve?”
SPC’s Assessment of Critical Thinking (ARC) Scoring Template
Rater (scorer) name: _____________________________Paper ID: _____________________Date: ____________________
Performance
Element
I. Communication
Define problem in
your own words.
II. Analysis
Compare & contrast
the available
solutions.
III. Problem Solving
Select & defend your
final solution.
Exemplary
(4)
Identifies the main idea
or problem with
numerous supporting
details and examples
which are organized
logically and
coherently.
Proficient
(3)
Identifies the main idea
or problem with some
supporting details and
examples in an organized
manner.
Uses specific inductive
or deductive reasoning
to make inferences
regarding premises;
addresses implications
and consequences;
identifies facts and
relevant information
correctly.
Thoroughly identifies
and addresses key
aspects of the problem
and insightfully uses
facts and relevant
evidence from analysis
to support and defend
potentially valid
solutions.
Uses logical reasoning to
make inferences
regarding solutions;
addresses implications
and consequences;
Identifies facts and
relevant information
correctly.
Identifies and addresses
key aspects of the
problem and uses facts
and relevant evidence
from analysis to develop
potentially valid
conclusions or solutions.
Developing
(2)
Identifies the main
idea or problem with
few details or
examples in a
somewhat organized
manner.
Emerging
Not Present
(1)
(0)
Identifies the main idea Does not identify the
or problem poorly with main idea or problem.
few or no details or
states the main idea or
problem verbatim from
the text.
Uses superficial
reasoning to make
inferences regarding
solutions; Shows
some confusion
regarding facts,
opinions, and relevant,
evidence, data, or
information.
Identifies and
addresses some
aspects of the
problem; develops
possible conclusions
or solutions using
some inappropriate
opinions and
irrelevant information
from analysis.
Makes unexplained,
unsupported, or
unreasonable inferences
regarding solutions;
makes multiple errors
in distinguishing fact
from fiction or in
selecting relevant
evidence.
Identifies and addresses
only one aspect of the
problem but develops
untestable hypothesis;
or develops invalid
conclusions or
solutions based on
opinion or irrelevant
information.
Does not analyze
multiple solutions.
Score
4 3 2 1 0
    
N/A 
Comments:
4 3 2 1 0
    
N/A 
Comments:
Does not select and
defend a solution.
4 3 2 1 0
    
N/A 
Comments:
Rater (scorer) name: _____________________________Paper ID: _____________________Date: ____________________
Performance
Element
IV. Evaluation
Identify weaknesses in
your final solution.
V. Synthesis
Suggest ways to
improve/strengthen
your final solution.
VI. Reflection
Reflect on your own
thought process.
“What did you learn
from this process?”
“What would you do
differently next time to
improve?”
Exemplary
(4)
Insightfully interprets
data or information;
identifies obvious as well
as hidden assumptions,
establishes credibility of
sources on points other
than authority alone,
avoids fallacies in
reasoning; distinguishes
appropriate arguments
from extraneous
elements; provides
sufficient logical support.
Insightfully relates
concepts and ideas from
multiple sources; uses
new information to
enhance final solution;
recognizes missing
information; correctly
identifies potential effects
of new information.
Identifies strengths and
weaknesses in own
thinking: recognizes
personal assumptions,
values and perspectives,
compares to others’, and
evaluates them in the
context of alternate points
of view.
Proficient
(3)
Accurately interprets
data or information;
identifies obvious
assumptions, establishes
credibility of sources on
points other than
authority alone, avoids
fallacies in reasoning;
distinguishes
appropriate arguments
from extraneous
elements; provides
sufficient logical
support.
Accurately relates
concepts and ideas from
multiple sources; uses
new information to
enhance final solution;
correctly identifies
potential effects of new
information.
Developing
(2)
Makes some errors in
data or information
interpretation; makes
arguments using weak
evidence; provides
superficial support for
conclusions or
solutions.
Emerging
(1)
Interprets data or
information
incorrectly;
Supports conclusions
or solutions without
evidence or logic;
uses data,
information, or
evidence skewed by
invalid assumptions;
uses poor sources of
information; uses
fallacious arguments.
Not Present
(0)
Does not evaluate
data, information, or
evidence related to
final solution.
Inaccurately or
incompletely relates
concepts and ideas
from multiple sources;
shallow determination
of effect of new
information on final
solution.
Poorly integrates
information from
more than one source
to support final
solution; Incorrectly
predicts the effect of
new information on
final solution.
Does not identify
new information for
final solution.
Identifies strengths and
weaknesses in own
thinking: recognizes
personal assumptions,
values and perspectives,
compares to others’,
with some comparisons
of alternate points of
view.
Identifies some
personal assumptions,
values, and
perspectives;
recognizes some
assumptions, values
and perspectives of
others; shallow
comparisons of
alternate points of
view.
Identifies some
personal
assumptions, values,
and perspectives;
does not consider
alternate points of
view.
Does not reflect on
own thinking
Score
4 3 2 1 0
    
N/A 
Comments:
4 3 2 1 0
    
N/A 
Comments:
4 3 2 1 0
    
N/A 
Comments: