is 477 business data communications design 1. overview designing a lan for a small company (
TRANSCRIPT
IS 477BUSINESS DATA
COMMUNICATIONS
Design 1
Overview
Designing a LAN for a small company (<10 people) Needs analysis Technology design Cost assessment
2x2 Classification Table
USER
APPLICATION
Typical HighTraffic
Typical
HighTraffic
100
100/1000
100/1000
???
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
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
Classify users (III)
Clerical Assistants: 2 people does all the
paperwork, including faxing, ticket issuing, postage, etc.
Typical
Classify applications
Travel Systems Pegasus, Sabre, etc.
Word Processing MS Office 2010
Accounting Software Quicken
High Traffic
Typical
Typical
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
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
Design 1-1
H
FS
M
Internet (ISP)
Shared Ethernet
P2
P2
P1
P1
PR
6 Consultants1 AssistantOwner
1 Assistant
Design 1-2
SW
SW
Travel Consultants Management/Clerical
Internet (ISP)
M
FS
EF
P2P1
P1PRP2
P2
P2 PROwner2 Assistant
6 Consultants
Design 1-3
R SWSW
Travel Consultants Management/Clerical
Internet (T1)
FS EF
P2
PR
P2
P2
PR
FSP2
PR
P2P2
FO FO
6 Consultants
2 Assistants
Owner
X2
Design 1-3-1
R
SWSW
Travel Consultants Management/Clerical
Internet (T1)
FSEF
P2
PR
P2
P2
PR
FSP2
PR
P2 P2
FOFO
6 Consultants
2 AssistantsX2
Owner
Decision time!
Which one will work? Which one works best? Which is best value for money? Therefore, which one would you
recommend?
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)
Software Costs
Windows 7 (9-clients) $3500
Microsoft Office 2010 (9-clients) $4500
Quicken $500
Who is going to manage thenetwork? $50-60K
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