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MN621 Network Requirement Analysis, Plan and Design Assessment 2 Answer

Assessment Details and Submission Guidelines
Unit CodeMN621
Unit TitleAdvanced Network Design
Assessment TypeAn individual written report and group demonstration – Assignment 2
Assessment TitleNetwork requirement analysis, plan and design
Purpose of the assessment (with ULO Mapping)This assignment is designed to assess students’ knowledge and skills related to the following learning outcomes:
  1. Apply concepts and theories of human factors as related to network design and implementation;
  2. Evaluate performance metrics and dimensions according to specifications.
Weight15% of the total assessments
Total Marks50
Word limit1200 – 1500
Submission Guidelines
  • All work must be submitted on Moodle by the due date along with a Title Page.
  • The assignment must be in MS Word format, 1.5 spacing, 11-pt Calibri (Body) font and 2.54 cm margins on all four sides of your page with appropriate section headings.
  • Reference sources must be cited in the text of the report, and listed appropriately at the end in a reference list using IEEE referencing style.
Extension
  • If an extension of time to submit work is required, a Special Consideration Application must be submitted directly on AMS. You must submit this application three working days prior to the due date of the assignment. Further information is available at:
http://www.mit.edu.au/about-mit/institute-publications/policies-procedures-and-guidelines/specialconsiderationdeferment
Academic Misconductthe Academic Integrity Section in your Unit Description.

Assignment Description

Project Scope: A case study for Barranquilla Plaza Hotel is considered. The link for the case study referring to Barranquilla Plaza Hotel can be found in the Appendix.

The summary of the case study is that the hotel’s Wireless Access service was poor and had issues, such as dropped connections, dead zones and insufficient capacity. A wireless solution was provided (refer to the case study for further details) which was received very well by the customers. As a result, the overall experience of the customers improved remarkably.

Provided 5 different departments of the hotel, guest rooms, multiple restaurants, pool area, reception area and a bar, a generic network layout diagram of the hotel is presented below for illustrative purposes only.

Assignment Requirement: Provided the advantages of a layered approach (core, distribution and access), the hotel considers redesigning its network adopting a layered approach. The new network design requirements are a) three-layered network design (core, distribution and access) b) redundancy required in the core layer.

Gathering information about the existing network (such as IP addressing scheme, traffic restriction policies, applications used etc.) is paramount for any network redesign for a seamless transition. In this regard, the staff members and IT staffs can be invaluable sources of information. A carefully designed questionnaire can be instrumental in gathering information.


Generic Network layout


Figure 1. Generic Network layout

Part I: Information collection

Develop a questionnaire to gather requirements from staff members, IT members and management. The followings are to be covered in this section.

  • What kinds of questions would you ask to understand their environment to each group of users better?
  • For the Quality of Service (QoS) requirements, it is mandatory to acquire information about the traffic types from the IT staffs and set the bandwidth requirement accordingly. Specifically, for the new design, the followings criteria have to be satisfied.

For real-time traffic, bandwidth percentage should be set to 70 of the available bandwidth. For FTP traffic, bandwidth should be set 200 kbps.

For SMTP traffic, bandwidth should be set to 800 kbps.

Note that traffic information is important and will be used for QoS. QoS reflects on the performance evaluation of the design.

  • How would you validate and verify the gathered information?

Part II: Network redesign and Demonstration

This is a network redesign and demonstration section. The following are to be covered.

  • A three-layered network design (consisting of the Core, Distribution and Access) is needed.
  • The new design must be the transformation of the existing design show in Figure 1 (i.e., IP addressing, number of departments etc., should remain intact in the new design).

For demonstration, the format would be a) no more than 2 persons in a group, b) at least 3 viva voce questions related to the design, and c) demo and viva voce duration 5 – 7 mins (at max). The following is to be covered.

  • Demonstration of a part of the design in Week 10 lab class (hardware platform)

Note to the lab tutor: As per the need, the lab tutor can allocate 15 mins in Week 9 and Week 10 for work progression check and consultation.

Answer

Part 1:

Develop a questionnaire to gather requirements from staff members, IT members and management.

  1. what are the benefits typically received for the task? 
  2. Are you fulfill with its security equipment's? If not, how might you increment the security? 
  3. Is secret word verification is sufficient for the security of information? 
  4. How to deal with the entrance level all the more effectively? 
  5. What is the calamity recuperation plan? 
  6. What are your desire from the system? 
  7. How to deal with the system all the more effectively? 
  8. What is the most significant and basic purpose of system? 
  9. List out your significant exercises?

Questionnaire For IT 

  1. How to deal with the client rights? 
  2. How much traffic is normal amid the pinnacle hours? 
  3. What is the sort of traffic typically system have? 
  4. What about MQC.? 
  5. What level of classifications needs Hi-Quality of Service? 
  6. What about lining.? 
  7. What kind of bytes utilized for Asynchronous Transfer Mode and Category of Service lining?

QoS is the technology framework which helps in the management of data traffic and helps to reduce the packet loss, latency and Jitter on the networks. It helps in controlling and managing the network resource with the help of priorities and specific types of data on the network. Usually the organizations networks are able to provide and predict the application service level such as voice, video or transferring of any sensitive data over the network. There are different tools and techniques such as jitter buffer or traffic shaping. It is the part of network maintenance to provide the certain level of performances in the network. To measure the QoS, following quantitatively parameters has been analyzed to measure the network performance (Lymberopoulos) Packet Loss 

  • Jitter 
  • Latency 
  • Bandwidth 
  • Mean Opinion Score

Packet Loss

Normally bundle misfortune happens when system connections, for example, switch and switches begin dropping parcels, it ordinarily happens when the system gadgets clogged. At the point when gadgets are blocked, they begins to drop the bundles on continuous correspondence among the gadgets, the correspondence ordinarily includes the voice, video and live gushing.

Jitter:

Jitter happens more often than not in the system when it is blocked excessively, it includes the float and course changes generally. The esteem jitter increments a lot in the system will results in the debase nature of nature of voice and video correspondence.

Latency:

It is the timeframe, which requires some serious energy from the bundles to make a trip from source to goal, it ought to be equivalent to estimate to zero. Various advances have been taken to set aside a few minutes is practically equivalent to 0 or close to 0. Inertness in voice or video calls results reverberation and covering of it. 

Bandwidth: 

Transfer speed is generally alludes the limit of the system correspondence connect which requirements for the transmitting of information from indicate A Source other point B Destination. QoS helps in the advancing the system with the assistance of data transmission the executives and needs of settings for a portion of the applications that require more assets then the others for the most part.

Mean Opinion Score:

MOS is the measurement, which rates the voice quality, the voice quality is appraised over the size of 5 distinct focuses, which aides in recognizable proof of most astounding quality.

The implementation of QoS has usually three different models 

  1. Best Effort
  2. Integrated Services
  3. Differentiated Services 

Best Effort:

The model of Best Effort, in QoS model helps all the packets, to make sure that every packet receives the same guarantee of the delivery and same priority. Best Effort makes sure that every packet should receive by the sender. The strategy of Best Effort is applied on the networks where infrastructure supports the QoS policies. 

Integrated Services:

Integrated service known as IntServ, is one of the QoS model which receives the bandwidth with the specific path on the network. Applications from the network ask for the resource reservation and different network devices which monitors the flow of traffic among the network. The intServ implementation requires different Int-Serv capable routers which implements the Resource Reservation protocol (RVSP) to manage the network resource reservation. It usually has limited scalability and high consumption of the network resource.

Differentiated Services:

Separated Services known as DiffServ, is one of the QoS model, where the diverse system components, for example, switches and switches are arranged based on various IP classes and needs. It was settled based on organization's prerequisites and needs how to delineate on Differential administrations. More often than not in the system, Voice traffic has higher needs then other sort of administrations in the system, each parcel has appointed with the separated administration point code which aides in the characterization too. It suggests the per-bounce conduct for the execution of QoS procedure I.e. Lining, prioritization of bundles.  QoS more often than not alludes to the intensity of a system, which creates the higher administration to pick the system traffic over the diverse basic advancements together with Asynchronous Transfer Mode, neighborhood called LAN, 802.1 system, Sonet and IP-based systems. The multiprotocol name exchanging incorporates the private connection that offers start to finish QoS on the single way, SLA and MPLS indicates the transmission capacity, QoS inactivity and uptime is additionally a costly choice for the association. 

Programming Defined WAN uses the numerous connectives kinds of MPLS and broadband. It screens the present system associations for execution and examine the availability types, if the parcel misfortunes from the predetermined dimension SD-wan will search for another elective associations. The ongoing transport convention, is a web convention standard that stipulates the various ways for applications to deal with the constant transmission of multi media information. the convention covers the two correspondences climate it is unicast or multicast. It is for the most part utilized in the web communication interchanges, where it can deal with the constant transmission of sound or video information. the RTP itself doesn't ensure the parcels exchange among the gadgets however it encourages them in the landing of bundle at the goal (Qian).  The FTP speed has been set at the gadget to 200 kbps, the smtp indicated traffic speed is 800 kbps.

Network Design 

The network design is specifically design for the core, distribution , access layers in which the connectivity can be more appropriate at organizational level because the user’s accessibility should be optimized while making the proper data transmission.

network design

Validate and verify:

The QoS configuration are observed using some 3rd party tools, which helps in the analysis of graphs and DSCP marking of the data transfer and bandwidth utilization, if any unusual thing is observed it ll be listed for the further investigation but in case if it doesn’t, then file transfer mechanism has been observed among the two different machines to test the server cycles, latency period etc. the speed has been observed, the set speed limit is the 200 kbps for the file transfer from machine A to machine B. if the speed limit is not achieve then the QoS needs to be trouble shoot. The validation of the QoS is tested over the specified speed for FTP as well as for SMTP. The network ahs been with the standard of QoS to ensure the performance is up to the mark. 

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