CH11 - Chapter 11: Build a Small Network Introduction to...

Introduction to Networks v5.1
Chapter 11:
Build a Small Network

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11.0 Introduction
11.1 Network Design
11.2 Network Security
11.3 Basic Network Performance
11.4 Summary

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Upon completion of this section, you should be able to:
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Identify the devices used in a small network.
•
Identify the protocols used in a small network.
•
Explain how a small network serves as the basis of larger networks.

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Typical Small Business Network
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Small networks have simple designs.
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Only a small number of network devices are needed.
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A small network usually comprises one router, a couple of switches, and
the user PCs.
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A connection to the Internet is achieved through a single WAN link
(commonly either cable or DSL).
•
Most of the managing task is related to
maintaining and troubleshooting existing
equipment.
•
The management of a small network is
usually done by an employee of a third
party company.

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Factors to consider when choosing a device in addition to those listed in
the graphic include OS features:
• Security
• QoS
• VoIP
• L3 switching
• NAT
• DHCP

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Address space is a crucial component of a network design.
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All devices connected to the network require an address.
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The address scheme must be planned, documented, and maintained.
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Address space documentation can be very useful for troubleshooting.
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Address documentation is also very important when controlling resource
access.

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Redundancy to a Server Farm
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A network should reliable by design.
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Network failures are usually very costly.
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Redundancy increases reliability by
eliminating single points of failure.
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Network redundancy can be achieved by
duplicating network equipment and links.
•
A good example is a network’s link to the
Internet or to a server farm.

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Traffic type and patterns are should also be considered when designing
a network.
•
A good network design categorizes
traffic according to priority.

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Network Applications
• Used to communicate over the network.
• Email clients and web browsers are examples of this type of application.