Jason’s Marvelous Electronics is a manufacturing firm that has recently undergon
ID: 3778535 • Letter: J
Question
Jason’s Marvelous Electronics is a manufacturing firm that has recently undergone some expansion. Originally, they had one location with 2 buildings: 1 office building and a manufacturing plant but since have added another location. The original location of the company is in Nashville, TN with 150 computers in the office building and 50 computers in the plant. The new location is in Pittsburgh, PA with one office building that will house 75 computers. Currently, Nashville is running 10BaseT within each building. The networks at this location are heavily overloaded. In Pittsburgh, there is no network installed at this time; the building is an older structure and did not come with any network infrastructure. There is currently no network connection between the buildings in Nashville, but this is one objective in building the new network. There is also no WAN connection between Nashville and Pittsburgh, but this is another objective of the company.
Describe the network you would recommend by providing answers to the following questions. Make sure to number your responses to coincide with the questions presented by design section. In answering each question, include any assumptions you used to make your decision.
LAN Design
What is the recommended speed and specification of the network at each location? (2.5 points)
What cabling would be required to create the LANs? (2.5 points)
What network devices do you recommend the company use to create the LANs? (2.5 points)
How many devices will be needed? You will need to consider the number of ports on the devices you are recommending to answer this question. (2.5 points)
Backbone Design
How will you connect the LANs within each building? (2.5 points)
What is the recommended speed of these connections? (2.5 points)
What cabling would be recommended to connect the LANs? (2.5 points)
What network devices do you recommend the company use to connect the LANs? (2.5 points)
How will you network the buildings together in Nashville? (2.5 points)
What is the recommended speed of the network? (2.5 points)
What cabling is required for creating the recommended core network? (2.5 points)
What network devices would be required to create the core network? (2.5 points)
WAN Design
What type of WAN connection should the company use to connect its two locations? (2.5 points)
What speed is required for the WAN? (2.5 points)
What connections/cabling are required for this service? (2.5 points)
What equipment is required for this service? (2.5 points)
Subnet Addressing
You have been given a Class B IPv4 address to use for the organization. Please note the address here (you make it up)? (2.5 points)
How many subnets will the organization need? (2.5 points)
What are the subnets – by location? (2.5 points)
What is the subnet mask for the subnets? (2.5 points)
Explanation / Answer
LAN Design:
At 10BaseT, network operates at 10Mbps, it is given network is heavily overloaded and so it is recommended speed of 100Mbps at each location and baseband. 100Base-T4
Cabling require for 100Base-T4 is Unshielded twisted pair cable with RJ-45 connectors.
Network devices to create the LANs: 1. Ethernet hubs to connect a small number of nearby computers. 2. Ethernet switches to connect hubs. 3. Routers to connect these switches, 4. Ethernet bridges to connect these routers. 5. Internet or Telecom service providers network to connect these bridges at Nashville and Pittsburgh.
Number of devices: 1. Hubs: There are 4-port, 8-port and 16-port hubs. Assume you have 8-port hubs. Hence 150 computers need 150/8 = about 20 hubs at Nashville office, 50/8 = about 7 hubs at Nashville plant and 75/8 = about 10 hubs at Pittsburgh. (Totally about 37 to 40 hubs based on the computers location). One or two ethernet switches (5, 8, 16, 24 port switches are available) at each of these locations based on the distance between hubs (or the floors). Mostly one router and one ethernet bridge at each location.
Backbone design: LAN within each building - 100 Base T4 or 100 Base FX (Fast Ethernet) or even Gigabit ethernet like 802.3z (1000 Base) may be used.
Recommended speed between these connections would be 1000 Mpbs.
Cabling recommended: Multi-mode fibre optics
Network devices: Ethernet bridges are required to connect the LANs.
Leased lines or VPNs (Virtual private networks) may be used to connect the buildings at Nashville.
Recommended speed of the network: Based on the LANs speed at each of these locations (may be 1Gbps)
Network devices: For VPNs, connect your routers to service providers, else use leased lines.For VPNs, VPN servers (with VPN software) are the devices
WAN design: WAN connection required: Again VPNs may be used.
WAN speed: Normally operates at 150 Mbps. Based on the technology used, speed may be improved.
Connections/Cabling: Through public networks like telephone system or leased lines.
Equipments: Routers/bridges connected to public networks or leased lines.
Subnet addressing: Class B IPv4 - Network address: 172.16.0.0: Example IP addresses - 172.16.1.1 - 172.16.1.20; 172.16.2.1 to 172.16.2.100;
Subnets required: minimum 3. As the company used Class B network, more than 65000 hosts can be connected at a location. Based on the divisions used, switches etc. the number of subnets is decided.
Subnets at the locations may be 172.16.1.1 to 172.16.1.254 , 172.16.2.1 to 172.16.2.254, 172.16.3.1 to 172.16.3.254 etc.
Subnet Mask: 255.255.0.0
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