NTN College Logical Network Design Presentation

Business Goals and Constraints

Network design denotes to the planning put in place to implement a computing network infrastructure. It involves the evaluation and having the understanding of the scope of the network to be deployed. The entire network is presented as a network diagram that acts as the blueprint for the implementation of the physical network. Main activities in a network implementation include but are not limited to cabling structure, IP addressing structure, logical diagram of the network to be put in place, network security facilities and location, quantity and type of network devices (Pop, 2012).

In this document we are designing network for NTN College. Basically, our task will be to implement the above mentioned list of activities.

List of Business Goals and Constraints

A business goal denotes to objectives that a company prospects to achieve and a business constraint refers limitations such as time, physical, fiscal limitations that are anticipated as parameters that are affects the business goal achievement. NTN private nursing experiences the following list of business goals and constraints:

Goals

1. Improve NTN’s business communications to real-time and be instant based.
2. Modernize NTN’s outdated technologies

• Improve partnership with intern students

1. Readily avail data to employees within offices of NTN and home-care employees to make best decisions.
2. Improve computing security especially patient data.

Constraints

1. Staffing and budgetary: budget and staffing is another hot topic in a profit making firm. Most of the administration will want to have huge marginal outputs in relation to inputs. This is, of course why they are in the market, is it so? Us as networking we may right and materials to implement the network design. For instance, implementation of homecare unit will require most recent technology to be implemented (IoT), we understand that the newer the technology the more expensive it becomes. Telemedicine implementation will require resources. Additionally, as project will be in progress more staff will be needed. The two above will be a constraint to our client NTN.
2. Scheduling: implementation of this project may time due to logistical processes to be adhered to. For example, acquisition of licenses from the government may be a hurdle, hence affecting the scheduling of the entire project.

• Policies and politics: our client NTN is likely to encounter politics staffs and us the network designers. However, professionally, as network designers, we will listen to the politics and perform what is expected.

Technical goals

1. Scalability: scalability denotes to how much growth our network design will support. In part of NTN’s management requirements, we are informed the network is expected to double. This must be included in the network design. Additionally, scalability also entails how many applications, WAN links, users and new technology will be accommodated without performing a redesign of the network.
2. Availability: NTN’s network should be 99.9999% availed due to homecare facility which will be used to diagnose patients remotely.

• Reliability: reliability is a factor of accuracy, reduced error rates and more stability. NTN network should error free and more stable as lives of patients will depend on this accuracy.

1. Performance: performance measures response time in terms of throughput, accuracy, utilization, efficiency latency and time between request time and response from the receiver. NTN’s network is expected to be highly performing since some goals such class virtualization will require real-time kind of operation.
2. Security: our network design is expected to protect both inside and outside resources against network threats.
3. Usability: this technical goal defines how easy NTN’s employees access network services and resources will. For instance, users will require to access share files in order to work on them(Nogueira & Salvador, 2013).

Trade-offs

There are a set of trade-offs which are made to ensure that the technical goals will be attained. In the meantime the trade-off is a process that advocates the lessening or the leaving aside of some of the looked-for good results of that the project would have appreciated for the expense of another decent result. Our NTN has to trade-off more positive returns in order to upturn more staff to work as teachers to the predictable number of students.

Table of User Communities, Data Stores, Network Applications and Traffic Flows

 A user community denotes to the group of people who are legible to use our NTN nursing school network infrastructure. Below is our user community table

User community name	Data store	Network application	Traffic flow
Administration	Web server, file sharing server, email server	Google Chrome, world client mailing application	File transfer, messaging and mailing, voice
Accounting	Hospital ERP system	SAP HANA	File sharing, batch data, transaction data
Nursing team	Browser, mailing	Chrome browser	Messaging and mailing, file transfer,
Students	Cloud video server	Cisco Webex	Videoconferencing, voice
Network administrators	Logs for Open view, alerts for alert page	Open view, alert page	Network management,
Doctoring team	Web browser, email, Cloud centre	Google chrome browser, MS. outlook	File transfer
Nurse Lecturer	File server, mailing, cloud	Webex for teleconferencing	Videoconferencing

Model for addressing and naming

An IP address refers a unique number that is assigned to a networked computing device to uniquely identify it on the network. In our NTN network design, we are going to use Class C IP address type. Our service provider given IP is assumed to be 192.168.10.0 /24. We are using VLSM subnetting to allow future growth. Our model for addressing are tabulated below.

Location	Size	Octet	Network Address	First Usable Address	Last Usable Address	Mask
HQ	200	256	192.168.10.0	192.168.10.1	192.168.10.25	/24
Darwin	100	128	192.168.11.0	192.168.11.1	192.168.11.126	/25
Cairns	100	128	192.168.11.128	192.168.11.129	192.168.11.254	/25
WAN 1	2	4	192.168.12.0	192.168.12.1	192.168.12.2	/30
WAN 2	2	4	192.168.12.4	192.168.12.5	192.168.12.6	/30
WAN 3	2	4	192.168.12.8	192.168.12.9	192.168.12.10	/30

Naming

Naming is key in a networked environment as it helps identify a network device by name. Our naming structure will follow the following naming structure.

Location_DeviceNameNo for instance, switch 2 in Darwin satellite campus will be, Darwin_Switch2.

Explanation and justification of the logical network design

The diagram below shows the logical diagram network design for NTN. Justification.

Network component	Quantity	Justification
HQ
Router	1	Router required to route information from inside and outside HQ LAN
Switches	4-48Port	Switches required to expand HQ LAN ie 4*48 = 384 nodes
Wireless access-points	2	Wireless network to be accessed by handheld devices. Each floor will have 1 wireless AP.
Server	2	One server to host mail and messaging, file sharing, NTN’s ERP system and another to host DHCP,DNS,WEB server,
Firewall	1	Firewall used to offer security management service.
Cairn
Router	1	Router required to route information from inside and outside Cairn LAN
Switches	2-48Port	Switches required to expand Cairn LAN ie 2*48 = 96 nodes Other computing devices will be using Wi-Fi
Wireless access-points	2	Wireless network to be accessed by handheld devices. Each floor will have 1 wireless AP.
Server	1	server to host mail and messaging, file sharing host DHCP,DNS,WEB server,
Home Gateway	1	Smart gateway will be used in implementation of IoT
Darwn
Router	1	Router required to route information from inside and outside Darwn LAN
Switches	4-48Port	Switches required to expand HQ LAN ie 2*48 = 96 nodes
Wireless access-points	2	Wireless network to be accessed by handheld devices. Each floor will have 1 wireless AP.
Server	1	server to host mail and messaging, file sharing host DHCP,DNS,WEB server,
Home Gateway	1	Smart gateway will be used in implementation of IoT

Logical network diagram(s) including addressing and naming

Discussion of routing and switching protocols

Routing protocol denotes to the mechanism by which packets within a network are routed to another network. In our network design for NTN private college, we are using OSPF. We chose this routing protocol due to its modular convergence and ease of management features. For instance, a single area represents a full complete network.

Discussion of security mechanisms

In any computing environment, security that protects computing infrastructure is important. There are millions of network attackers out there who are trying their best to access other people’s computing infrastructure to have self-gain from their vulnerable activities. Since NTN private college handles patient data (which ought to be super confidential), network security has to be implemented. To accomplish this, we are using Cisco ASA firewall to protect such kind of health data.

References

Nogueira, A. & Salvador, ‎., 2013. A Practical Approach to Corporate Networks Engineering. 2nd ed. Chicago: River Publishers.

Pop, P. C., 2012. Generalized Network Design Problems: Modeling and Optimization. Berlin: Walter de Gruyter.