1. IS 477 BUSINESS DATA COMMUNICATIONS Design 1

2. Overview  Designing a LAN for a small company (<10 people)  Needs analysis  Technology design  Cost assessment

3. 2x2 Classification Table USER APPLICATION Typical High Traffic Typical High Traffic 100 100/1000 ???

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

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

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

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

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

9. Nomenclature P1 Typical PC (1.5GHz) P2 High Traffic PC (2.8GHz) PR Printer FS File Server EF Email/Fax Server M Modem H Hub SW Switch R Router

10. Design 1-1 H FS M Internet (ISP) Shared Ethernet P2 P1 PR 6 Consultants 1 Assistant Owner 1 Assistant

11. Design 1-2 SW Travel ConsultantsManagement/Clerical Internet (ISP) M FS EF P2 P1 PR P2 PR Owner 2 Assistant 6 Consultants

12. Design 1-3 RSW Travel ConsultantsManagement/Clerical Internet (T1) FS EF P2 PR P2 PR FS P2 PR P2 FO 6 Consultants 2 Assistants Owner X2

13. Design 1-3-1 R SW Travel ConsultantsManagement/Clerical Internet (T1) FS EF P2 PR P2 PR FS P2 PR P2 FO 6 Consultants 2 Assistants X2 Owner

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

15. Hardware Costs  Typical PC (inc. NICs)  High Traffic PC (inc. NICs)  Hub (10/100 BaseT)  Switch (10/100 Mbps)  Router  Cabling (Cat5e)  WAN/MAN connection (T1, DSL, ISDN, Modem, ISP)

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

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