Network Enterprising

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Candidate:

Module: Enterprise Networking

Programme: BSc Information Systems

Case Study: Network Design for China Steel Ltd

Table of Contents

Introduction3
Network Diagrams3
Inter-Site Connections (WANS)3
Leased Line4
Circuit Switching4
ISDN4
Packet Switching5
MPLS5
VPN (Remote Access)6
Inner-Site Connections (LANS)6
Physical & Data Link Protocols6
LAN Hardware Requirements7
Layer 3 Protocols8
IPv4 & IPv68
DHCP & DHCPv69
Server Requirements9
Domain Controller9
Exchange Server10
Web Server (IIS)10
Backup Server11
Virtual Servers11
Security & Disaster Recovery11
Authentication11
Backup System12
Firewalls13
Anti-Virus13
Physical Security13
References14
Appendix A & B – Network Diagrams15

Introduction

The purpose of this assignment is to design and recommend a full network infrastructure for China Steel Ltd, a steel works organisation in China. The company have plants in every province throughout the country but up to now each has worked in isolation. Due to recent procurement problems and other issues, the company would like to connect all sites to a network so that ordering of raw materials, distribution and reporting becomes easier. In particular the network should support:

▪ Inter centre communications
▪ Communications to all headquarters with sufficient mechanisms for large file data transfer. ▪ Access to the Internet (Telnet, FTP, HTTP)
▪ Facilities for remote interrogation of databases at remote sites ▪ Web Server and email systems
▪ Appropriate bandwidth and servers for streaming video, audio, etc ▪ Other applications necessary to deliver disaster relief

In each section of this report I will detail the methods and technologies chosen to support the above requirements. I will say why I have chosen the technology and whether or not there were any alternatives. I will also produce a network diagram showing the WAN and LAN design.

Network Diagrams

Appendix A – WAN Drawing
Appendix B – LAN Drawing

Inter-Site Connections (WANS)

One of the main objectives for China Steel Ltd is to have inter-site communication to allow integration of processes such as ordering of raw materials and distribution of goods. Having all company sites connected to a Wide Area Network (WAN) allows for a complete Enterprise Resource Planning (ERP) system to be implemented which can help the organisation to fully manage the supply chain as well as link to the supply chain of other companies. A WAN connects multiple Local Area Networks (LANs) together over a distance using a range of technologies, from dedicated leased lines, to dial-up connections and ISDN. “WANs cover a geographical area beyond that of a MAN (Metropolitan Area Network) perhaps all an organisations offices in a country or even beyond national boundaries” (Computer Networks 2nd Edition, Philip Irving, 2005). The following sections give details of how the sites will be connected together using WAN technology.

There are different technologies available to create a Wide Area Network, each has advantages and disadvantages. These technologies are summarised below.

Leased Line

A leased line is a permanent connection using telecommunication lines from one point to another, for example from one business location to another. The line is leased from the telecommunications company and generally have a high cost associated with them. Leased lines are not shared with any other networks or users, therefore they are very secure and the bandwidth is guaranteed. Organisations may choose to use a leased line if the possibility of downtime is not an option, for example if business critical applications are running across the WAN link. Unlike ADSL connections, leased lines do...
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