NETWORK DESIGN AND CONFIGURATION DOC

IT-295-1501-01
Unit 3 Individual Project
Network Design and Configuration
Jamie Mendenhall
Professor Laura Malave
January 10, 2015

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NETWORK DESIGN AND CONFIGURATION DOC

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Table of Contents
NETWORK DESIGN……………………………………………………………………………………………………..3
Network Diagram…………………………………………………………………………………………………………3
Network Design Discussion…………………………………………………………………………………………..4
Cost summary………………………………………………………………………………………………………………4
SERVER AND WORKSTATION OPERATING SYSTEMS…………………………………………..5
Workstation………………………………………………………………………………………………………………….5
Server………………………………………………………………………………………………………………………….6
Installation and configuration…………………………………………………………………………………………6
NETWORK PROTOCOLS…………………………………………………………………………………………….7
SSH…………………………………………………………………………………………………………………………….7
FTP (File Transfer Protocol)………………………………………………………………………………………….7
SNMP (Simple Network Management Protocol)………………………………………………………………8
Telnet (Telephone Network)…………………………………………………………………………………………..8
IP Protocol…………………………………………………………………………………………………………………..8
TLS (Transport Layer Security)……………………………………………………………………………………..9
Network Protocol Configuration…………………………………………………………………………………….9
USERS AND SECURITY……………………………………………………………………………………………..11
DATABASE AND BACKUP…………………………………………………………………………………………12
References…………………………………………………………………………………………………………………….13

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NETWORK DESIGN
A network design is a picture of the system showing the connections and nodes in computer
network. The current system is a medical imaging system. The name of the company is RLMI.
The company works for scheduling imaging for their patients. The network design is developed
to show a computerized system for the company.
Medical
Imaging
Server

Network Diagram
Printer

Database
Server

Remot
e
Access
to
clients
via
web
for
schedu
ling
and
result

Web
Server
Inte
rnet

Fir
ew
all

Core Switch

Fir
ew
all

Printer

Printer
Workstations in bus topology

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Network Design Discussion
The above network design shows the proposed network for the computerized system of the
company. This diagram depicts the required hardware and their topological arrangement. This
design contains a web server to allow the intranet of the company access the outer world internet
and help clients to retrieve their results and schedule meetings. A medical imaging server will
provide the medical imaging service to the clients by managing the imaging software on the
workstations. The database server is included to keep the data of the clients and to provide a
solid backup.
There are two firewalls placed, one between the external world internet and web server, the other
between the web server and the company’s intranet, to protect the sensitive information of the
company from intruders. The 10 workstations used, are arranged in bus topology to assist the
functioning of the imaging technicians. There are 6 computers for the clerical staffers, 1 for sale
and customer service representative and 3 for the doctors. Three printers are also included in the
network diagram, 1 for the doctors, 1 for the imaging technicians and 1 for clerical staffers. A
core switch is used as the central point as it will connect all the nodes and servers together for the
proper functioning.
Cost summary
Hardware
Web Server
Medical Imaging Server
Database Server
Workstations
Computers
Printers
Switch

Cost
$6000
$12000
$17000
$28000 (each)
$400 (each)
$200 (each)
$550

Time required to install and configure
4 hours
7 hours
8-10 hours
3-4 hours
1 hour
Half hour
5-6 hours

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SERVER AND WORKSTATION OPERATING SYSTEMS
Workstation
The logic of the workstation is implemented into two parts, the first is PACS (Picture achieving
communication system) and the second is RIS (Radiology information system). PACS can
perform three types of diagnosis: large matrix image, small matrix image and grayscale display
of high resolution applications. The RIS can be designed according to the usage.
The small matrix image diagnosis by PACS is done on 17 inches color monitors. X-ray analysis
is done on 21 inches color monitors. The RIS workstations are set up with common personal
computer configuration, if they are not involved in imaging process. The basic requirement of
the system can be easily satisfied through efficient workstations.
Operating System and Versions for WorkStation – In the network for workstation I will
choose windows operating system. Windows 8 operating system Enterprise version will be
installed in all workstations.
Reason To Choose – Reason for choosing this Operating system is that in network workstation
is getting used for medical imaging purpose. Systems need to be high performance oriented and
need to power applications such as graphic art, 3-D design, Video Editing. OS should provide all
multimedia application support and should provide effect User interface to operate through this
application. Windows 8.1 provides easily customizable user – interface,3D printing support, WiFi Direct wireless printing support, biometric enrollment, provides security, deliver performance,
provides updates, and compatibility to help manage today’s devices and infrastructure, provides
facility for Work from multiple locations and from multiple devices
Windows 8.1 Enterprise version brings business premium features through Windows Software
Assurance. It includes all of the same features of Windows 8.1 Pro and then adds features like

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Windows To Go, BranchCache, DirectAccess, Virtual Desktop Infrastructure (VDI), AppLocker,
and Windows 8 app deployment.
Server
Operating System and Version – The server used for medical imaging will be windows server
2012, with Fedora 9 and SQL. Standard version will be installed for windows server 2012.
Reason To Choose – Reason for choosing this is because this Operating system provides globalscale cloud services in network infrastructure with new features and enhancements in
virtualization, storage management, networking, access and information protection, virtual
desktop infrastructure, the web and application platform. Another reason is that it is the most
updated and enhanced OS form windows so in near future there will be no need for upgrading it.

Installation and configuration
For installing the OS on server and workstations first step will be ensuring system requirements
are fulfilled. Workstation should have 1 gigahertz processor, with at least 1 GB RAM for 32 bit
and 2 GB for 64 bit, with 16 GB / 20 GB space with Microsoft DirectX 9 graphics device with
WDDM driver. For server 1 GHz CPU supporting Intel-VT or AMD-V, 4 GB RAM with 50 GB
space is required. Network administrator will install the OS and then after installing, for
configuration server will be hosted by the core switch and will be connected to the workstations
for providing the imaging system. Network administrator will configure server sore, delegate
administration. Next step will be deploying roles on remote servers, convert Server Core to/from
full GUI, configuring NIC teaming. All workstations will be configured with outlook mail client
and will be having a updated antivirus scan system to protect them.

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NETWORK PROTOCOLS

Used Network Protocols are – SSH, Telnet, FTP, TCP/IP, SNMP and TLS to ensure that
network remains secure and proper user authentication mechanism is implemented in network.
SSH
It stands for Secure Shell and is application layer protocol. This protocol will be used by RLMI
between the external world internet and company’s web server. This protocol will be used
instead of Telnet, FTP (file transfer protocols) or other insecure remote shell protocols SSH will
provide secure remote access facility for RLMI system users from the remote location.

Reason to Choose: As SSH protocol is a cryptographic network protocol which provides secure
data communication, remote access by command line login including remote command
execution along with other secure network services between two networked computers. SSH
connects workstations via a secure channel over an insecure network where a server and a client
continuously runs SSHclient and SSH server programs.

FTP (File Transfer Protocol)
FTP will be used between workstations that are in bus topology and other workstations avaiable
for clerical staffers with in the company network itself.
Reason To Choose – FTP is a standard network protocol used to transfer files from one host to
another host over a TCP based network. FTP provides client-server architecture and by using a

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clear-text sign-in protocol which required authentication in the form of a username and password
ensures intiitial level of security in the network.

SNMP (Simple Network Management Protocol)
The entire network of RLMI will be linked by this protocol including workstations, servers,
printers and gatways.
Reason to Choose -This protocol provides functionality for monitoring and status information
on a network. It monitors each decvice which is using SNMP protocol. SO in network it will
monitor printers, servers and workstations and will report information back to the management
systems by the use of traps which capture snapshot data of the system in the network.

Telnet (Telephone Network)
It will be used across the network in organization. The remote server must be running a Telnet
service for clients to connect. It provides provide a bidirectional interactive text-oriented
communication facility.
Reason to Choose – Talent provides a connection-based virtual terminal or remote login across
the network which provides fast access to other computer in same network.

IP Protocol
This connection less protocol will be used between workstations and the printers. It is session
less so no session will be created and acknowledgement of packets that are sent out will be the
responsibility of higher layer protocols such as TCP.

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Reason to Choose – There a session less protocol required so it will work best and will be
responsible for addressing and routing of packets like images or other files to print.

TLS (Transport Layer Security)
In RLMI imaging systems there are needed various http sessions and because of their security
TLS can be used.
Reason to Choose – It also supports NAT transversal while IPSec does not provide the same. It
provides communication security over the Internet.

Network Protocol Configuration
For configuring Network protocol on workstation with Windows OS use following settings

Go to network connections by clicking on control panel and then clicking on network and
internet and finally by clicking on manage network connections.

Do right-click a local area connection. Authenticate with username password for
Administrator permission and then click on install

In the Select Network Feature Type dialog box, choose one and install a network protocol
by clicking on client, and add it.

These are basic setting required on windows system

Configuration steps for SSH protocol (with sample commands) is as following

Configure Hostname for the router by using commands o Name #configure terminal
o Enter configuration commands, one per line

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o Name (config) #hostname LabRouter
o LabRouter (config) #

Next step will be configuring domain name with the use of IP domain-name command
o LabRouter (config) #ip domain-name xxx.com

Generate a certificate to encrypt the SSH packets using the crypto key generate rsa
command

Configure vty lines for SSH access and specify database used for authentication to the
device
o LabRouter (config) #line vty 0 4
o LabRouter (config-line) #login local
o LabRouter (config-line) #transport input ssh

Create an account on local Database on router
o LabRouter (config) #Name xxx privilege 15 secret xxx

Last setting will be fine tuning of SSH Configuration

Similarly other network protocol will be configured. After configuration a proper testing of
network is required which will ensure that all the protocols are configured properly and system is
secure.

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USERS AND SECURITY

Out of 20 staff members there are 10 imaging technicians, 3 doctors, 1 sale and customer
representative and 6 clerks. The database and other system of the RLMI systems needed to be
authorizing each of the users to provide the relevant and limited access to each.
For example, the technicians may be needed to have full access to the imaging systems while on
other side the tools used for imaging system are only accessed by the doctors. The doctors have
nothing to do with the other details to they must have limited access portal. Finally the clerks
have nothing to do with the imaging tools so they should be authenticated according to their
work and rest of the staffs should be kept away of all the system.
A secure login password can authenticate each and everyone in the staff. They will have their
individual accounts in the system portal. The information shown to doctors will be separated by
the one shown to technicians. They all will have their separate passwords. This authentication
can be achieved on presentation layer or application layer of network.

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DATABASE AND BACKUP
RLMI system can use following type of data backup and restoration:
Normal backups
With the modification of any file which value to imaging systems, it is backed up in
database servers being used in RLMI.
Daily backups
With the use of daily backup, continuity in data storage can be maintained. As there are
needed various customers’ data in the existing systems, it can be a part of data backup
process.
Incremental Data backups
It creates the backup of latest modified file in the system. It can be used in RLMI system
as there are various customers who will visit only once and there data does not need to be
backed up. The frequent data should be backed up instead of old data.

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References
Futtersack, P., Maier, D., & Velez, F. (1990). A study of three alternative workstation-server
architectures for object oriented database systems. University of Wisconsin-Madison,
Computer Sciences Department.
Ylonen, T. (2006). The Secure Shell (SSH) Authentication Protocol. Cisco Systems, Inc.
Postel, J., & Reynolds, J. (1985, October 1). File Transfer Protocol (FTP). Retrieved from
https://www.ietf.org/rfc/rfc959.txt
Postel, J. (1972, October 1). Telnet Protocol. Retrieved from ftp://ftp.rfc-editor.org/innotes/rfc318.txt
Add or remove a network protocol, service, or client. (n.d.). Retrieved from
http://windows.microsoft.com/en-in/windows-vista/add-or-remove-a-network-protocolservice-or-client
Litzkow, M. J., Livny, M., & Mutka, M. W. (1988, June). Condor-a hunter of idle workstations.
In Distributed Computing Systems, 1988. 8th International Conference on (pp. 104-111).
IEEE.
Voydock, V. L., & Kent, S. T. (1983). Security mechanisms in high-level network protocols.
ACM Computing Surveys (CSUR), 15(2), 135-171.
Konrad, D. R., & Sipple, R. E. (1995). U.S. Patent No. 5,404,508. Washington, DC: U.S. Patent
and Trademark Office.
System requirements. (n.d.). Retrieved from http://windows.microsoft.com/en-IN/windows8/system-requirements

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Lowe, S. (2012, July 6). Microsoft announces four Windows Server 2012 editions. Retrieved
from http://www.techrepublic.com/blog/data-center/microsoft-announces-four-windowsserver-2012-editions-what-you-need-to-know/

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