Digital Graphics Design (DGD) is a medium-size graphic design company located in Melbourne. It offers a wide range of graphic design services to different companies/clients to popularise their brands and help them with their publicity by creating state-of-the-art pieces such as flyers, logo, multimedia presentations, magazine titles, visiting cards, websites, profiles, and adding graphics to existing marketing material as per the client’s requirements.
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Assessment 3 Designing and implementing a network CSE2NFX Network engineering fundamentals 2 © Didasko 2020. All rights reserved. 2 Objectives ▪ Examine the given scenario and create a performance analysis document. ▪ Apply appropriate network physical standards for different network scenarios. ▪ Determine and plan the appropriate classless IP addressing scheme for the given scenario. ▪ Assign proper subnets / VLSM subnets. ▪ Configure the networking devices. Copying and plagiarism This is an individual assignment. Students are not permitted to work in a group when writing this assignment. Plagiarism is the submission of another person’s work in a manner that gives the impression that the work is their own. La Trobe University treats plagiarism seriously. When detected, penalties are strictly imposed. Further information can be found on http://www.latrobe.edu.au/students/academic- integrity/explanation/plagiarism Submission guidelines Your assignment submission should be typed, not written/drawn by hand. Submit the electronic copy of your assignment through the subject LMS. Submission after the deadline will incur a penalty of 5% of the available assignment mark per day capped at 5 days. No assignment will be accepted after 5 days. If you have encountered difficulties that lead to late submission or no submission, you should apply for special consideration. © Didasko 2020. All rights reserved. 3 Part A: Design the proposed network topology Scenario Digital Graphics Design (DGD) is a medium-size graphic design company located in Melbourne. It offers a wide range of graphic design services to different companies/clients to popularise their brands and help them with their publicity by creating state-of-the-art pieces such as flyers, logo, multimedia presentations, magazine titles, visiting cards, websites, profiles, and adding graphics to existing marketing material as per the client’s requirements. The office consists of two levels. As a part of their expansion the managing director of DGD has recently hired two more levels within the same building. Table 1 shows the total number of staff and devices by location and Figure 1 illustrates the current network setup. Level Staff/devices Number Level 1 Administrative staff 30 IT support staff 4 Database server 1 Printers 2 Level 2 Graphic designers 40 Marketing staff 22 Printers 2 Level 3 Website developers 35 Managers 10 Printers 2 Level 4 Project coordinators 15 Accounting staff 5 Programmers 30 Printers 2 Total 200 Table 1 4 © Didasko 2020. All rights reserved. 4 Figure 1 Note • Figure 1 does not show all staff devices and printers. All staff computers, database server and printers are connected to D-Link DES-1026G 24-port 10/100 (Mbps) unmanaged switches via Cat3 cable. Also, a Linksys gateway device is connected to the network for internet access. All staff save their work-related data over the local area network to a centralised database server (located on level 1). However, after the inception of two more levels, the network performance has dropped. Staff are complaining about the slow transfer of data to the database server; also when sharing their work- related data over the local area network to other computers. © Didasko 2020. All rights reserved. 5 You have been appointed to redesign an appropriate local area network for DGD. The design should ideally be such that all the staff from one level can communicate with all other staff within the office with good speeds. The managing director of DGD also expects users to experience fast download speeds when browsing the internet. To avoid a slow and sluggish network, the managing director of DGD has asked you to propose a LAN design to fulfil the above requirements. Note • This design needs only one router and the managing director has already purchased a Cisco router, model number 2811. So when attempting Task 1 (below), you are NOT required to suggest the router model. • Your focus should be on improving the LAN performance. You need to perform the following task. Task 1: Produce a performance analysis document Based on the above information, you are required to produce a performance analysis document, including the following. a) Examine the existing local area network topology (as shown in Figure 1) and perform an analysis on why the current network performance is slow. b) Your recommendations for improving LAN performance. Note In your recommendations, you need to focus on topology, LAN devices, cables, etc. c) Recommended network components as part of improving the LAN performance. Provide a list of network components, network component specifications, quantity, location and compliance IEEE standards of the selected networking components. You can use Table 2, shown below, as a template to list the components of your topology. The first two rows are examples. Starting from the third row, you will have to provide an answer for the Cisco 2811 router and your chosen network components. Component Specification (Number of ports, speed, connector type) Quantity Location Compliant standards Hub (example) 16 ports, RJ45 connector How many hubs? Level number IEEE 802.3af 6 © Didasko 2020. All rights reserved. 6 Cable (example) UTP N/A Everywhere Cat3 Cisco 2811 router (Given to you by DGD) 2 built-in Gigabit Ethernet ports More expansion slots are available to add more Ethernet ports. 1 unit Level 1
Table 2 Note Add all the written answers in a Word file named xxx_cse2nfx_assessment3.docx (where xxx is your student number). Mention the task number in the Word file. Part B: Implement IP routing in a simulated environment Scenario Digital Marketing (DM) is an enterprise marketing firm. As a part of their expansion, DM is planning to open two new branches in Sydney and Canberra. The managing director of DM has decided to use IPv4 class B network address 172.16.0.0/16 for both new offices. Before moving to the actual design and implementation phase, the managing director provided you with a simulated design of the proposed network (as shown in Figure 2), which will assist you in understanding the entire network topology. © Didasko 2020. All rights reserved. 7 Figure 2 Note • Figure 2 does not show all end devices and LAN switches. • You need to use Cisco Packet Tracer software to configure the routers. Therefore, for simulation purposes, consider that all the routers are Cisco 2811 series. • Only the devices shown in Figure 2 are to be used throughout this assessment. • Add all the screenshots and written answers in a Word file named xxx_cse2nfx_assessment3.docx (where xxx is your student number). Mention the task number in the Word file. Table 3 shows the number of host addresses (including WAN link) for both branches’ LAN. Branch Network Number of hosts Sydney LAN1 440 LAN2 390 LAN3 280 WAN1 (Sydney to Canberra) 1 Canberra LAN4 530 LAN5 340 LAN6 485 8 © Didasko 2020. All rights reserved. 8 WAN1 (Canberra to Sydney) 1 Table 3 You have been hired as a network engineer to effectively design the IP addressing scheme for each LAN and WAN link by minimum address wastage. Each LAN has a different number of host requirements, so, in this scenario, the FLSM method is not a good idea. You need to apply the VLSM method and perform the following task. Task 1: Design the IP addressing scheme This is a critical planning step. To support your planning, two table templates (Table 4 and Table 5) are given below. a) Fill Table 4 with the planned IP addressing scheme (in dotted decimal notation) for each LAN by using the VLSM method. LAN1 Customised subnet mask (VLSM subnet mask) Address prefix length (i.e., 172.16.0.0./?) VLSM subnetted network address First usable IP address Last usable IP address LAN2 Customised subnet mask (VLSM subnet mask) Address prefix length (i.e., 172.16.0.0./?) VLSM subnetted network address First usable IP address Last usable IP address LAN3 Customised subnet mask (VLSM subnet mask) Address prefix length (i.e., 172.16.0.0./?) VLSM subnetted network address First usable IP address Last usable IP address LAN4 Customised subnet mask (VLSM subnet mask) © Didasko 2020. All rights reserved. 9 Address prefix length (i.e., 172.16.0.0./?) VLSM subnetted network address First usable IP address Last usable IP address LAN5 Customised subnet mask (VLSM subnet mask) Address prefix length (i.e., 172.16.0.0./?) VLSM subnetted network address First usable IP address Last usable IP address LAN6 Customised subnet mask (VLSM subnet mask) Address prefix length (i.e., 172.16.0.0./?) VLSM subnetted network address First usable IP address Last usable IP address Table 4 b) Fill Table 5 with the planned IP addressing scheme (in dotted decimal notation) for the WAN link by using the VLSM method. WAN link (Sydney to Canberra) New VLSM subnet mask (customised subnet mask) Address prefix length (i.e., 172.16.0.0./?) VLSM subnetted network address First usable IP address Last usable IP address Table 5 10 © Didasko 2020. All rights reserved. 10 Task 2: Build the topology After designing the IP addressing scheme, you need to create the network diagram shown in Figure 2 using a Cisco Packet Tracer. Use suitable cable types when cabling the devices (for example, Ethernet or serial). Label the devices as depicted in Figure 2. a) Save the Cisco Packet Tracer file as xxx_cse2nfx_assessment3.pkt (where xxx is your student number). b) Include a screenshot of your topology as evidence of the completion of this task. Note No configuration is required in Task 2; only a network diagram with relevant devices and