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Term
Paper Project: Designing a Secure Network

Due Week 10 and worth 190 points

This term paper involves putting together the various concepts learned
throughout this course. You are tasked with designing the most secure network
possible, keeping in mind your goal of supporting three (3) IT services: email,
file transfer (centralized), and VPN. Your first step is to design a single
network capable of supporting there three (3) different services. Once you have
fully designed your network, you will need to provide three (3) workflow
diagrams explaining how your designed network handles the three (3) different
transactions. The first is an internal user sending an email using his / her
corporate email address to a user on the Yahoo domain with an arbitrary address
of [email protected] The second workflow diagram should show a user initiating
an FTP session from inside your network to the arbitrary site of
ftp.netneering.com. The third workflow is an externally located employee
initiating a VPN session to corporate in order to access files on the Windows
desktop computer, DT-Corp534-HellenS, at work.

Write a ten to fifteen (10-15) page paper in which you complete the following
three (3) Parts. Note: Please use the following page breakdown to complete your
assignment:
·
Overall network diagram: One (1) page
·
Datapath diagrams: Three (3) pages (one for each diagram)
·
Write-up: six to ten (6-10) pages
Part
1
·
Using Microsoft Visio or its open source alternative, create a
diagram showing the overall network you’ve designed from the user or endpoint
device to the Internet cloud, and everything in between, in which you:
o
Follow the access, core, distribution layer model.
o
Include at a minimum:
§ Authentication
server (i.e. Microsoft Active Directory)
§ Routers
§ Switches
(and / or hubs)
§ Local
users
§ Remote
users
§ Workstations
§ Files
share (i.e. CIFS)
§ Mail
server
§ Web
servers (both internal and external)
§ Firewalls
§ Internet
cloud
§ Web
proxy
§ Email
proxy
§ FTP
server (for internal-to-external transport)

·
Explain each network device’s function and your specific
configuration of each networking device.
·
Design and label the bandwidth availability or capacity for each
wired connection.
Part
2
·
Using Microsoft Visio or its open source alternative, create a
Datapath Diagram for the following scenario:
o
Local user sends email to a Yahoo recipient. Local (corporate)
user having email address[email protected]sends
an email to [email protected]
§ Document
and label the diagram showing protocols and path of the data flow as data
traverses through your network from source to destination.
§ Include
path lines with arrows showing directions and layer 1, 2, 3, 4, 5, 6, and 7
(OSI) protocols that are used for each flow.
§ Show
user authentication when necessary.
·
Using Microsoft Visio or its open source alternative, create a
Datapath Diagram for the following scenario:
o
Local user, Jonny Hill, transfers file using ftp through the
Internet to another company’s site (ftp.netneering.com). He
has to access the secure shell using his active directory credentials to
authenticate to the ftp server (linux running Redhat) on the DMZ. He needs to
transfer files from his desktop across the Internet toftp.netneering.com.
§ Document
and label the diagram showing protocols and path of the data flow as data
traverses through your network from source to destination.
§ Include
path lines with arrows showing directions and layer 1, 2, 3, 4, 5, 6, and 7
(OSI) protocols that are used for each flow.
§ Show
user authentication when necessary.
·
Using Microsoft Visio or its open source alternative, create a
Datapath Diagram for the following scenario:
o
Remote user, Hellen Stover, connects via VPN from home through
the Internet to her corporate desktop, DT-Corp534-HellenS. Hellen uses a
browser to initiate her VPN connection. By browsing tohttps://VPNaccess.corp534.com, she
arrives at a login page where she needs to authenticate using her Active
Directory credentials before the VPN tunnel is built.
·
Document and label the diagram showing protocols and path of the
data flow as data traverses through your network from source to
destination.
·
Include path lines with arrows showing directions and layer 1,
2, 3, 4, 5, 6, and 7 (OSI) protocols that are used for each flow.
·
Show user authentication when necessary.
·
Explain how your overall design protects the organization from
both inside and outside attacks. Give examples.
·
Explain how your layered design compensates for possible device
failures or breaches in network security.
·
Determine whether any possible bottlenecks exist in your design.
·
Explain how to make the file transfer process more secure.
Part
3
·
Use at least three (3) quality resources in this assignment.
Note: Wikipedia and similar Websites do not qualify as quality resources.
Your
assignment must follow these formatting requirements:
·
Be typed, double spaced, using Times New Roman font (size 12),
with one-inch margins on all sides; citations and references must follow APA or
school-specific format. Check with your professor for any additional
instructions.
·
Include a cover page containing the title of the assignment, the
student’s name, the professor’s name, the course title, and the date. The cover
page and the reference page are not included in the required assignment page
length.
·
Include charts or diagrams created in Visio or an equivalent
such as Dia. The completed diagrams / charts must be imported into the Word document
before the paper is submitted.

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