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Answered: - Build and design a network for small company Using LAN, WAN,


Build and design a network for small company

Using LAN, WAN, switch, server and computers how to connect them together

The building has many section like Admin , HR ect

How to use the IP address and subnet

>>>

see the attachment there is the PPT for the lecture design a network may it help

i need it report and ppt .

Could u please finish it as soon as possible



BUSINESS DATA

 

COMMUNICATIONS &

 

NETWORKING

 


 

Chapter 6

 

Chapter 6

 

Network Design

 

Network Design

 


 

FitzGerald ? Dennis ? Durcikova

 

6-1

 

Prepared by Taylor M. Wells: College of Business Administration, California State University, Sacramento

 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

Outline

 

? Network architecture components

 

? Traditional network design

 

? Building-block network design

 

? Needs analysis

 

? Technology design

 

? Cost assessment

 

? Implications for management

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-2

 


 

Network Architecture Components

 

?

 

?

 

?

 

?

 

?

 


 

Local area network (LAN) ? Ch. 7

 

Building backbone network (or distribution layer) ? Ch. 8

 

Campus backbone (or core layer) ? Ch. 8

 

Data center ? Ch. 7

 

Enterprise edge

 

? Wide area network (WAN) ? Ch. 9

 

? Internet access ? Ch. 10

 

? e-commerce edge ? Ch. 7 & 11

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-3

 


 

Network Architecture Components

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-4

 


 

Traditional Network Design

 

?

 

?

 


 

?

 

?

 


 

A structured systems analysis and design process

 

Network analysis phase includes:

 

? Meeting with users to determine the needs and applications

 

? Estimating data traffic on each part of the network

 

During the network design phase, the logical and physical networks

 

are designed and circuits and hardware selected

 

Implementation phase is the building and implementing of the

 

network

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-5

 


 

Traditional Network Design

 

? Pros

 

? Useful for static and slowly evolving networks

 

? Cons

 

? Costly

 

? Time consuming

 

? This approach may not be adequate today due to:

 

? Rapid changes in technology

 

? Escalating network traffic demands

 

? Decrease in hardware costs and increase in staff costs

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-6

 


 

Building Block Network Design

 

? Uses a few standard components to

 

simplify design and reduce costs

 

? Iterative design phases

 

? Needs analysis

 

? Understand current and future network

 

needs (users and applications)

 


 

? Technology design

 

? Examine available technologies to

 

determine which meet or exceed needs

 

? If needs are difficult to estimate, build

 

higher capacity

 


 

? Cost assessment

 

? Evaluate financial costs of technology

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-7

 


 

Needs Analysis

 


 

Needs

 

Analysis

 


 

? Why is the network needed?

 

? Performance issues may exist

 

? The organization may be standardizing

 

? Hardware may need replacement

 

? What users and applications must be supported?

 

? Goals differ depending on the network component

 

? LAN and BN typically are built with organizational ownership

 

and are often built with excess capacity

 

? WANs rely more on leased equipment and circuits are typically

 

designed at or near capacity with organizations leasing additional

 

circuits as required

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-8

 


 

Needs Analysis

 


 

Needs

 

Analysis

 


 

? Baselines

 

? Create metrics of current operations to compare design

 

requirements against

 

? Baselines may include

 

? Sequence of operations

 

? Processing times

 

? Work volumes

 

? Existing costs

 

? Existing user/management needs

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-9

 


 

Needs Analysis

 


 

Needs

 

Analysis

 


 

1. Break down the network into architectural components

 

? Evaluate all seven components

 

? Often easiest to start with WANs

 

? Geographic scope of network

 

2. Review the existing and expected applications that will

 

use the network

 

? Identify hardware and software requirements for these

 

applications

 

? Identify protocols used by applications

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-10

 


 

Needs Analysis

 


 

Needs

 

Analysis

 


 

3. Identify and assess network users

 

? Some users may have very different needs

 

? How many of each type of user?

 

4. Categorize network requirements

 

? Mandatory

 

? Desirable

 

? Wish-list

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-11

 


 

Needs Analysis

 


 

Needs

 

Analysis

 


 

? Deliverable: Logical network design

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-12

 


 

Technology Design

 


 

Technology

 

Design

 


 

? Development of a physical network design (or set of

 

possible designs)

 

? Design includes clients, servers, circuits, and networking

 

devices (routers, gateways, access points, switches, etc.)

 

? What new hardware needs to be purchased?

 

? Can the existing equipment be upgraded?

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-13

 


 

Technology Design

 


 

Technology

 

Design

 


 

1. Designing clients and servers

 

? Specify of the devices needed in standard units

 

? ?Typical? users are allocated base-level clients

 

? ?Advanced? users are allocated advanced clients

 

? Servers are similarly allocated based on application

 

needs

 

? Definitions of ?typical? and ?advanced? change as

 

hardware costs fall, and capabilities increase

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-14

 


 

Technology Design

 


 

Technology

 

Design

 


 

2. Designing circuits

 

? Capacity planning is the estimation of circuit size

 

and type required for each network architecture

 

component

 

? Circuit loading is an assessment of the amount of

 

data transferred across a circuit (currently or in the

 

future)

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-15

 


 

Technology Design

 


 

Technology

 

Design

 


 

? Estimating circuit traffic

 

? Average traffic vs. peak traffic

 

? Designing for peak traffic is ideal

 

? Estimating message volume

 

? Count messages sent in the current network and multiply by the

 

expected growth rate

 


 

? Precision may not be the major concern

 

? Obtaining precise estimates is difficult and expensive

 

? Standard circuit speeds ?stair step?

 

? Traffic typically increases more than anticipated

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-16

 


 

Technology Design

 


 

Technology

 

Design

 


 

? Should network designers plan for excess capacity?

 

? Upgrading costs 50-80% more than designing higher capacity

 

time

 

? Very few complaints about overcapacity

 


 

? Most organizations intentionally overbuild

 

? The turnpike effect occurs when traffic increases faster

 

than forecasts

 

? When networks are efficient and fast, users will use

 

them more frequently

 

? Most networks designed with excess capacity end up

 

using overcapacity within 3 years

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-17

 


 

Technology Design

 


 

Technology

 

Design

 


 

3. Network Design Tools

 

? Modeling

 

? Users create diagrams of existing or proposed networks

 

? Discovery

 

? Some tools can automatically create network diagrams by

 

examining existing network

 

? Simulation

 

? A mathematical technique used to model the behavior of a

 

network under real conditions

 

? Simulates applications and users generating traffic and

 

responding to messages

 

? May highlight potential problems

 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-18

 


 

Technology Design

 


 

Technology

 

Design

 


 

? Deliverable: One or more physical network designs

 

? Multiple designs may be created to highlight tradeoffs

 

between performance and cost

 

? Design of circuits and networking devices

 

? Designs for new/upgraded clients and servers

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-19

 


 

Technology Design

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

Technology

 

Design

 


 

6-20

 


 

Cost Assessment

 


 

Cost

 

Assessment

 


 

? Financial analysis of the various technology design

 

alternatives

 

? Complex process that requires analysis of many factors:

 

? Circuit costs (cabling and installation)

 

? Internetworking devices (switches and routers)

 

? Hardware costs (clients, servers, power supplies)

 

? Software costs (operating systems, application software

 

and middleware)

 

? Network management and maintenance costs

 

? Operations costs to run the network

 

? WAN and Internet circuits

 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-21

 


 

Cost Assessment

 


 

Cost

 

Assessment

 


 

? Request for proposal (RFP)

 

? Detailed specification of equipment, software, and

 

services desired from vendors

 

? Typically used in large network purchases

 

? May include timeline and evaluation criteria for proposals

 

? Allows the organization to evaluate offerings from different

 

vendors

 

? Multi-vendor proposals

 

? May provide better performance

 

? May be less expensive

 

? May be more difficult to manage

 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-22

 


 

Cost Assessment

 


 

Cost

 

Assessment

 


 

? Selling the proposal to management

 

? Understand that networks, data centers, and most

 

information technology is viewed as a cost center

 

? Make a business case by focusing on organizational

 

needs and strategy

 

? The importance of network speed, reliability, and

 

security are easy for non-technical users to understand

 

? Avoid focusing on technical details and jargon

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-23

 


 

Cost Assessment

 


 

Cost

 

Assessment

 


 

? Deliverables

 

? Finalized RFP that is sent to vendors

 

? Revised technology design with detailed specifications

 

including exact products and costs

 

? Business case for the network design

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-24

 


 

Implications for Management

 

? Network design increasingly relies on standardized

 

technologies and a building-block design

 

? The cost of hardware, software, and circuits is less

 

expensive in the long-run than human resources to

 

manage network

 

? This may make more expensive hardware that is easier

 

to manage a better long-term financial decision

 

? Network usage continues to grow and designing networks

 

with extra capacity is less expensive than upgrading later

 


 

Copyright ? 2015 John Wiley & Sons, Inc. All rights reserved.

 


 

6-25

 


 

 


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