Homework #2 Network Diagram for ABC Corporation

Homework #2

Network Diagram for ABC Corporation

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 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 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

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

IST 220 – Giacobe Page 1 Homework #2 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.