IS 477 BUSINESS DATA COMMUNICATIONS Design 1 Overview

IS 477 BUSINESS DATA COMMUNICATIONS Design 1

Overview v Designing a LAN for a small company (<10 people) Ø Ø Ø Needs analysis Technology design Cost assessment

2 x 2 Classification Table APPLICATION Typical 100 High Traffic 100/1000 USER High Traffic 100/1000 ? ? ?

Classify users (I) v Owner: Ø 1 person Ø plays a great deal of golf Ø rakes in the money Ø doesn’t do much else Ø OK, does the accounts (stand-alone) Typical

Classify users (II) v Travel Consultants: v 6 people v mainly working the telephones v some walk-ins v require (online) access to Travel Systems, such as Pegasus, Sabre, etc. Typical

Classify users (III) v Clerical Assistants: v 2 people v does all the paperwork, including faxing, ticket issuing, postage, etc. Typical

Classify applications v Travel Systems Ø Pegasus, Sabre, etc. High Traffic v Word Processing Ø MS Office 2010 Typical v Accounting Software Ø Quicken Typical

Design in threes 1. Cheapest alternative: Ø Meets only the core requirements, but cheap 2. Most likely: Ø Meets critical requirements close to the stated budget 3. Gold-plated Ø Takes advantage of the best of available products

Nomenclature P 1 Typical PC (1. 5 GHz) M Modem P 2 High Traffic PC (2. 8 GHz) H Hub PR Printer FS File Server EF Email/Fax Server SW Switch R Router

Design 1 -1 Internet (ISP) Shared Ethernet M P 2 Owner FS 1 Assistant P 1 H P 1 PR 6 Consultants 1 Assistant

Design 1 -2 Internet (ISP) Travel Consultants Management/Clerical FS PR P 2 6 Consultants P 1 P 2 M SW EF P 1 P 2 SW 2 Assistant Owner PR

Design 1 -3 Internet (T 1) Travel Consultants P 2 Management/Clerical FS FS P 2 EF P 2 Owner P 2 SW FO R FO SW P 2 PR 6 Consultants PR X 2 2 Assistants

Design 1 -3 -1 Internet (T 1) Travel Consultants P 2 EF P 2 FS Management/Clerical R FS Owner FO P 2 SW P 2 FO SW P 2 PR 6 Consultants PR X 2 2 Assistants

Decision time! v Which one will work? v Which one works best? v Which is best value for money? v Therefore, which one would you recommend?

Hardware Costs v Typical PC (inc. NICs) v High Traffic PC (inc. NICs) v Hub (10/100 Base. T) v Switch (10/100 Mbps) v Router v Cabling (Cat 5 e) v WAN/MAN connection (T 1, DSL, ISDN, Modem, ISP)

Software Costs v Windows 7 (9 -clients) Ø $3500 v Microsoft Office 2010 (9 -clients) Ø $4500 v Quicken Ø $500 Who is going to manage the network? $50 -60 K

Summary v For a small company LAN: Ø Most traffic will probably be confined to a particular group of users ü Ø Ø in this case, the Travel Consultants Plan to design in threes (most likely, cheapest, gold-plated) The design chosen will depend on: ü ü ü budget availability of space for devices, and, experience of management to recognize what is needed