Question

Overview Your assignment is to complete a network diagram for a small company. You will place a number of network elements on the diagram and label them appropriately. A network diagram is important to communicate the design features of a network between network administrators, system administrators, and cyber-security analysts. It helps to create a shared mental model between these different technologists, yet each will have their own perspective on what is important to have documented on the diagram. Please review a description of ABC Corporation’s network resources and how they are allocated. ABC Corporation’s Network Description ABC Corporation is a small business in the heart of Central Pennsylvania. They provide services to their clients all over the region. The three-story main office building is where all of the employees report to work each day. There are no remote users. ABC Corporation is a very traditional business. While they have a computer network and are connected to the Internet, they aren’t very fancy and don’t yet have a need for telecommuting, wireless networks, or smart phones. All of their computers are desktop machines and are connected with wired Ethernet connections. All of the network wiring is CAT-6 twisted pair wiring that goes from the office location to a wiring closet. There is one wiring closet on each floor. Each closet is connected to the basement wiring closet via fiber. There are several departments of the company. The administrative office has ten employees including the CEO, executive Vice-President, a human resources manager, and several assistants and secretaries. The finance office has fifteen employees. Both of these divisions are on the third floor. The second floor has the Sales and R&D departments. There are a total of twenty employees in the Sales Department and includes sales executives and assistants. All of the sales department personnel have laptop computers, but they are still connected via the wired network. The R&D department has ten engineers who have two computers each – one in their office and one in their lab spaces. The first floor has the shipping/receiving department, manufacturing department, and the receptionist. The receptionist shares a computer with the night watchman, since they work opposite shifts. There are twenty people in manufacturing, but they only use three computers to enter their production details into the company’s ERP system. The shipping/receiving department has six people, each with a computer that connects to UPS, Fedex, and USPS systems, prints packaging labels and shipping documents. There is also a conference room/training room on the first floor with a multimedia system that includes a podium computer, projector, and all of the bells and whistles. The basement houses the maintenance department, information technology, and the mail room. The mail room clerk doesn’t use the computers at all. The two maintenance workers have computers at their desks that they use to enter reports of work performed. The IT Department has seven employees, each with a desktop computer. They also manage the server farm, which includes two domain controllers, one print server, one mail server, one database server, one internal web server, one external web server (on the DMZ interface of the firewall), a file server, a special server for the ERP system, and a backup server. Layer 2/3 Network Devices Each floor needs to have an Ethernet switch in its network closet. Determine the number of ports that are needed on each floor. Don’t forget the basement. The server farm and DMZ each will need to have its own switch, separated from the users’ network. Each switch connects to a centralized router on a different interface, giving one subnetwork for each floor of the network, plus one for the server farm, one for the DMZ, and one for the Internet. Determine how many ports the router needs. IP Address Assignments The router will perform Network Address Translation between the local network and the Internet. Therefore, for each sub-network, assign a CIDR /24 sized network from the IANA private range of 172.28.0.0/16. One network should get 172.28.1.0/24, the next should get 172.28.2.0/24, the next should get 172.28.3.0/24 etc. While you could optimize the use of the IP range by using smaller subnets, this is not required in this assignment. Create a Network Diagram Your network diagram needs to include the following elements: • An Internet Service Provider Network (represented as a cloud) • Router with enough ports to meet the needs of the organization • A switch for each floor – you will need to identify how many ports each switch on each floor needs to have • You DO NOT need to show every single computer on your diagram. However, you need to show groups of computers, plus their use. So, if there are 5 people in the same department, you can show all 5 computers with one icon/glyph and label it appropriately. • Each grouping of computers needs to have the IP Address range documented on the diagram. Assign the x.x.x.1 address of each network to the appropriate port on the router. Network Documentation Your network design document needs to explain each element of the network. Each Layer two (switch) and Layer three (Router) device needs to be described in terms of number of ports. The number of computers for each department and floor also needs to be documented. The IP address ranges need to be explained – including the IP Address range that you assigned, the number of IP Addresses that the subnetwork will use, and the number of IP addresses that remain unused in that subnet. What to Turn In For assignments that require you to submit Visio work, please export your file and submit as a PDF. Also, please submit your original Visio file. You also need to turn in a Word document (.doc or .docx) file that explains your network diagram elements. Include snapshots from your network diagram in your Word document – and annotate your diagram snapshots to better help your explanation of your network.

Answer 1

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DIAGRAMS ARE CREATED IN VISION

Central Router

Net Address: 172.28.0.0/16

Ports: 6

Function: The central router is located in the basement of the building. It receives connections from each floor switch by a fiber connection and requires six active running ports. There are four user network switches, one external server switch, and one server farm switch. The router basically is a central gateway to the internet which it routes all traffic between floors to the server components in the basement server farm. Subnets include: 172.28.1.0/24, 172.28.2.0/24, 172.28.3.0/24, 172.28.4.0/24, 172.28.5.0/24, 172.28.6.0/24. Excluding net address for the network and router port, each subnet has 254 assignable IPs.

Server Farm Switch

Net Address: 172.28.1.0/24 IP Range: 172.28.1.1-256, 9 are used and 245 remaining

Ports: 9

The server farm switch is used to connect nine servers in the basement to the central router. The devices connected to the farm switch is one file server, one database server, one ERP server, one internal web server, one backup server, one mail server, one print server, and two domain controllers.

IP Range: 172.28.1.2/6, 172.28.1.10, 172.28.1.100, 172.28.1.20/21

Devices:

File server – FS01: 172.28.1.10

Database server – DB01: 172.28.1.100

ERP server – ERP01: 172.28.1.2

Internal web server – WEB01: 172.28.1.3

Backup server – BUP01: 172.28.1.4

Mail server – MS01: 172.28.1.5

Print server – PS01: 172.28.1.6

Domain controller 1 – DC01: 172.28.1.20

Domain controller 2 – DC02: 172.28.1.21

User Network Switch 0

Net Address: 172.28.2.0/24 IP Range: 172.28.2.2-256, 7 are used and 247 remaining

Ports: 9

User network switch 0 is used to connect seven desktop PCs from the IT Department and two from the maintenance department to the central router in the basement.

IT Department IP Range: 172.28.2.2/8

This department has seven desktop computers which are used by the information technology department to manage the server farm and all users.

Maintenance Department IP Range: 172.28.2.30/31

This department has two desktop computers which are used to enter reports of work performed.

Basement

External Server Switch

Net Address: 172.28.3.0/24 IP Range: 172.28.3.2-256, 1 is used and 253 remaining

Ports: 1

External switch is used for DMZ network traffic from the WEB02 external web server from the user network and server farm.

Basement

User Network Switch 1

Net Address: 172.28.6.0/24 IP Range: 172.28.6.2-256, 25 are used and 229 remaining

Ports: 25

The User Network Switch 3 is used to connect twenty-five computers from the administrative and finance offices to the central router in the basement from the third floor.

Administrative Office IP Range: 172.28.6.2/11

This department has ten computers which are used by the CEO, executive Vice-President, HR, and several administrative assistants and secretaries.

Finance Office IP Range: 172.28.6.30/44

This department has fifteen computers that are used by the finance employees.

3^rd Floor

User Network Switch 2

Net Address: 172.28.5.0/24 IP Range: 172.28.5.2-256, 40 are used and 214 remaining

Ports: 40

The user network switch 2 is used to connect twenty desktop computers in the R&D Department and twenty laptop computers from the Sales Department all connected to the central router in the basement from the second floor.

R&D Department IP Range: 172.28.5.2/11 and 172.28.5.30/39

This department has ten R&D department engineers and each have two computers, one in their office space and one in their lab space.

Sales Department IP Range: 172.28.5.50/69

This department has twenty laptop computers which are used by the sales department executives and assistants.

User Network Switch 3

Net Address: 172.28.6.0/24 IP Range: 172.28.6.2-256, 13 are used and 242 remaining

Ports: 12

The user network switch 1 is used to connect the multimedia system in the training conference room, six desktop computers in the shipping and receiving department, three desktop computers from the manufacturing department and one shared computer for the receptionist connected to the central router in the basement from the first floor.

Conference Room IP Range: 172.28.6.50

The training and conference room holds a multimedia system which includes a podium computer, projector, and all of the bells and whistles.

Receptionist IP Range: 172.28.6.2

This is used by the receptionist and the night watchman.

Shipping/Receiving Department IP Range: 172.28.6.10/15 and 172.28.6.100

This department has six computers that connect to externals such as FedEx, UPS and USPS to print package and shipping labels.

Manufacturing Department IP Range: 172.28.6.25/27

This department has twenty users which share three computers which are used for entering any production details into the ERP system.

1^st Floor

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