Overview

This assignment is for you 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 Corporations network resources and how they are allocated.

ABC Corporations 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 arent very fancy and dont 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 10 employees including the CEO, executive Vice President, a human resources manager, and several assistants and secretaries. The finance office has 15 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 20 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 10 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 20 people in manufacturing, but they only use 3 computers to enter their production details into the companys 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 doesnt 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 domaincontrollers, 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, aspecial 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. Dont 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 subnetwork, assign a CIDR /24 sized network fromthe 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