Advanced Medicos Limited Networking System Redesign

Desklib provides solved assignments and past papers to help students succeed.

CSC00240
Data Communications and Networks
Assignment 2 – Part(A)
Network Design for a Modern Software
development company
(Advance Medicos Limited Networking System)
Student Name : Subhash babu Chitturi
Student ID : 23211791
Tutor’s Name : Kevin Ramezani

Executive Summary
This project is about the Advance Medicos Limited (AML) company who wants to redesign its network
system. In this report, there are all the requirements defined which are listed by the AML company.
There is a network designed for a company which is being too gold and it involves the current scenario
of the company. In this report, a deep analysis will be performed on this company’s current network to
determine the important factors and assets over the network. After the analysis, all the assumptions and
requirements of the company will be provided to enhance the present network which will be used in
redesigning the network. This implementation will play an important role in the future scope of the
organization.
ii

Contents
Executive Summary.....................................................................................................................................ii
1. Introduction.............................................................................................................................................1
1.1 Purpose.............................................................................................................................................1
1.2 Background Information...................................................................................................................1
1.3 Scope for a new system.....................................................................................................................2
2. Analysis of User Requirements................................................................................................................2
2.1 Technical Goals..................................................................................................................................2
2.2 Business Goals...................................................................................................................................2
3. Description and Analysis of Current Network Setup................................................................................3
3.1 Data Transmission Media..................................................................................................................3
3.2 Network Hardware............................................................................................................................3
3.3 Logical Network Design.....................................................................................................................5
3.4 Network Physical Topology...............................................................................................................6
4. Description of Proposed Network...........................................................................................................7
4.1 Network Design.................................................................................................................................7
4.2 Network Architecture........................................................................................................................7
4.3 Network hardware............................................................................................................................8
4.4 User computers.................................................................................................................................8
4.5 Circuits and Cabling.........................................................................................................................10
4.6 Wireless network............................................................................................................................10
5. IP Addressing Plan.................................................................................................................................12
5.1 Network Topology...........................................................................................................................13
6. Conclusion.............................................................................................................................................15
References.................................................................................................................................................16
Appendix...................................................................................................................................................17
iii

List of Figures
Figure 1: Data Transmission Media, Cable Design.......................................................................................3
Figure 2: CISCO Router................................................................................................................................3
Figure 3: CISCO switch.................................................................................................................................4
Figure 4: CISCO Firewall...............................................................................................................................4
Figure 5: CISCO Access Point.......................................................................................................................5
Figure 6: Logical Network Design of AML....................................................................................................5
Figure 7: Network Physical Topology of AML..............................................................................................6
Figure 8: Physical network topology..........................................................................................................13
Figure 9: Logical network topology............................................................................................................14
Figure 10: Physical network topology........................................................................................................17
Figure 11: Logical network topology..........................................................................................................17
iv

1. Introduction
Advanced Medicos Limited (AML) is an organization which sells the health products digitally. Their
system is mainly hardware-based through which they provide health services to the customers. Now
Advance Medicos Limited wants to expand their business online so they can sell their products through
web application so all the customers can get the benefit of it and they don’t need to buy the hardware
system necessarily. All the customers want to buy an expert system and so the feedback is taken from
the customers and average customers are saying that the current network is too old and this system
needs to get replaced or redesigned.
1.1 Purpose
If the current network of the AML company will be redesigned using new technologies, then this
company will have a wide range for future growth and this network will give a boost to the company
sales performance and a strong customer relationship. The customer is the key elements for helping in
the growth of the company. It will increase communication between different department network
users (Wong, et al., 2015).
1.2 Background Information
The Advance Medicos Limited company is a digital health care company which provides users their
system for health care products. These products are basically on the hardware system which is a
company providing to its customers. So the company wants to deploy their online web application so
the customers can interact online without buying the offline system. The existing system has 200
employees and four departments, Other provided details are:
Department User Workstations, Printers
Software Development 70, 10
Production 5, 2
Marketing 10, 4
Administration 5, 2
The company network has user workstations and the attached devices for every department, the
number is mentioned above. There are two building A and B of this company. Both buildings are
separated with a distance of 20 meters. The production and Software development department is
settled in building A and both remaining departments are in building B. The Company server farm is
suited to building B.
1

1.3 Scope for a new system
The new network which is going to be built in to improve the existing network. The current scenario of
the network is providing many services to the company but if there is a possibility to add some more
factors to advance the network like remote access, wireless communication, advanced security,
application of Machine learning, Artificial Intelligence Implementation, etc. then this network can meet
the modern standards for networking and the operations will help in growing the business and
customers.
2. Analysis of User Requirements
2.1 Technical Goals
There are some technical goals which are expected to achieve in the redesigned network by comparing
to an existing network:
 As the business is expanding the requirements of employees are also increasing so the network
should be compatible to address that much users. AML’s existing network does not have
sufficient space to manage the growth of the employees. So the new system will have the
capacity to manage the employee count for at least the next five years.
 Security for a company network is a very sensitive topic as if someone tries to breach the
network security, he can access all the confidential data of the company. In the redesigned
system, the application of machine learning and Artificial Intelligence will help to maintain the
security concern more powerful (Aleshin, et al., 2015).
 The company has four building at one place so the current network is providing the Local Area
Connectivity (LAN) but with the expansion of the business the company is expanding the
branches to another place so the redesigned network should provide the connectivity among all
the offices through Wide Area Network (WAN), this will make the company network more
strong.
 The redundant network ensures availability of network but the existing network is getting too
old and it used to face downtime while connection, so the new network will support redundancy
so it will recover this issue and devices can connect anytime.
2.2 Business Goals
 A company has various type of confidential data like employee data, banking data and this data
has to be secured. The existing network is highly vulnerable and this causes many types of risk
on the data of the system. If the network is more secure than the business can grow without any
risk.
 Operations are based on communication between the company’s employees. Various types of
data are being transmitted among different departments and users. This old network is not
capable for the wireless connection so the new network will be redesigned using new
technologies like BYOD (Bring your own device) and work from home, which will help in making
the network smarter (Saravanakumar, et al., 2015).
2

 Advanced Medicos Limited has many assets like medical information, patient’s data, doctor’s
data, and all these data have to be secured over the company network. The redesigned network
will have more security to prevent the data from malicious activities.
3. Description and Analysis of Current Network Setup
3.1 Data Transmission Media
Figure 1: Data Transmission Media, Cable Design
This figure is of cable designing for Advance Medicos Limited. This diagram shows that there are many
cables of multiple varieties are used in this company’s network. In Local Area Network Infrastructure,
there are user devices and switches for the communication over the network. This communication is
processed through the Fast Ethernet Copper Straight cable in this infrastructure. Switches are connected
through Gigabit Ethernet Copper Cross cable in the existing network and the routers are connected
through Serial Media cable. All these cables are of different bandwidths (Voigt, et al., 2017).
3.2 Network Hardware
There is a list of network hardware which is used in designing this network:
1. Router - CISCO 2900 Router
Figure 2: CISCO Router
This router device is capable of the heavy workload and performance of this device is compatible with
company infrastructure. This router is compatible with HSRP and other protocols also. There are many
ways to configure and access this device.
3

2. Switch – CISCO SG350 Switch
Figure 3: CISCO switch
This device is available in three configurations, 12 switch port device, 24 switch port device, and 48
switch port devices. All three switch devices are very fast and support multiple protocols like VTP, STP,
etc. So these protocols can be easily configured over these switch devices.
3. Server AAA
This mentioned server is required in designing the network. This server is used to authenticate the users
who are using the company server at their home. For the configuration of this server, the CISCO service
is required to run and the RADIUS service is configured already in this server.
4. Firewall - CISCO ASA 5500-X Firewall
Figure 4: CISCO Firewall
The security is the most important concern for an organization’s network. This introduced firewall is
implemented in the network infrastructure to provide the security of the network to prevent
unauthorized access (Patel & Sharma, 2017).
5. Access Point - CISCO Aironet 3600 Series
4

Figure 5: CISCO Access Point
This access point provides wireless connectivity to users or employees. This access point has robust
technology which makes it quite configurable and they can work with higher bandwidths.
3.3 Logical Network Design
Figure 6: Logical Network Design of AML
This figure is displaying the logical network of the Advance Medicos Limited company’s network. All the
enlisted components of this network are included in this diagram of the network. There are two edge
routers mentioned here one router is configured in building A and B and the other one is configured at a
far remote location. For maintaining the security over the network there is a firewall placed and
configured just next to the edge router. The communication will be done after passing with the firewall,
so the Local Area Network will involve all the connected devices after the configuration and verification
at the firewall. The access point is configured in the network to provide wireless connectivity to the end
users. There is a server farm which is located in building B it makes the network private for the
5

company. For communication, users have to authenticate themselves to the server and then it provides
access to communicate through the network. This logical network design is perfect for the Advance
Medicos Limited company network and it will provide better communication and transmission over the
network (Singh, et al., 2018).
3.4 Network Physical Topology
Figure 7: Network Physical Topology of AML
This figure is displaying the network physical topology of the Advance Medicos Limited network. All the
required devices and components are showing in this diagram. This network physical design has three
components Building A, B and the far branch which is located at some distance from the headquarters.
This diagram depicts the devices connected through the network and all the components in physical
design or view. There are showing three floors in building A and B. These buildings are connected
through LAN and the distance office is connected through the Wide Area Network (WAN) (Rimal, et al.,
2017).
6

4. Description of Proposed Network
The new network is based on the old network which is configured for the Advance Medicos Limited
company. The designed network and physical diagram for this network show all the configured
requirements of a new system. The designing of both diagrams are done accordingly to the technical
and business goals which are required to achieve. There are some functionalities which are analyzed for
the new redesigned network:
 The vulnerabilities of the existed system are removed in the new system. Security is more strong in
the new network.
 The older network cannot provide the connectivity to the distance places but the new network
supports the wireless connectivity over the Wide Area Network.
 This new network is remotely accessed which is new functionality for the system and the server is
used to authenticate the users which will prevent the unauthorized users from data access ( Cziva, et
al., 2015).
4.1 Network Design
A network can only be designed when there are sufficient reasons backing the business and technical
requirements. Network architects must convince business managers using different documents of the
need for an upgrade or a complete overhaul of network infrastructure.
AML has identified through the use of different tools and analytical methods that the current network
infrastructure is no longer required. Preceding the previous requirement analysis phase, I will proceed to
identify the make-up for the new network. By applying the requisite knowledge and experience gained
as an expert, I will be guided by industrial standards and technologies in my choice of network models,
hardware and proposed network topologies.
AML’s drive towards implementing the new network should be facilitated by the results of the network
design phase. This document should guide anyone desiring to engage in a similar and challenging task as
this one.
4.2 Network Architecture
Network topologies are blueprints for implementing the network. The representation of nodes on a
topological map is the outcome of a model. Network architects rely on prescribed standard models to
build any network.
Based on knowledge gained from developing deep understanding of how networks are designed, the
commonly adopted and acceptable mode is a multilayer network. A multilayer network is based on a
hierarchical concept of 2 or 3 layers with blocks of hardware providing different functions to users. The
hierarchical mode exposed the limitations of a flat network design because it did not support changes
(adds) and upgrades without experiencing downtime in all cases a flat network does not support the
ability to grow the network.
7

The basic composition of the hierarchical network is that it consists of the core, distribution and access
layers. It is not a static model, therefore, I will implement only this layers in order to simplify the
network. These layers are the distribution and access layers. The distribution layer is an intermediary
layer between the access and the internet edge devices (routers and firewalls). The access layer is for
connectivity to any device at the internal edge of the local LAN.
4.3 Network hardware
Network hardware devices are the physical computing devices, connectors and cabling required to build
any proposed model. Each hardware platform has a set of supported features that define its applicable
usage. Before choosing any specific hardware, the network designer must understand how it fits into the
model and whether it can interconnect with other devices on the network.
The first step before deciding on any hardware is to compare the features supported and the technical
requirements of the design. The technologies supported must overlap the current design in order to
handle future upgrades. For AML network to successfully scale the current challenges and support the
company network over the next five years; I will propose a carefully studied host of hardware
components. Hardware devices must have the desired port and interfaces that support high
connectivity.
4.4 User computers
With varying types of computers proposed for use by the different departments, there will be three
types of computing devices as defined by the client. The type of devices includes laptop (Apple,
Macbook pro), workstations and desktop PC. After a comparative study of the devices available in the
market and matching them with the long term goals; the following vendor devices have been chosen
Laptop
Apple MacBook Pro 15.4"
16GB Memory
Intel Core i9
512GB Solid-State-Drive
Workstation
Dell 467DG Dell Precision 3630 Desktop Workstation with Intel Core i7-8700K , 16GB RAM, 512GB SSD
Desktop
8