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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.11-1
Building a Simple Serial Network
Exploring the Functions of Networking
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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.11-2
Outline
Overview
What is a Network?
Common Physical Components of a Network
Resource-Sharing Functions and Benefits Network User
Applications
Network Administration Applications
Characteristics of a Network
Summary
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What Is a Network?
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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.11-4
Common Physical Components of aNetwork
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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.11-5
Resource-Sharing Functions and Benefits
Data and applications
Resources
Network storage
Backup devices
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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.11-6
Network User Applications
E-mail
Web browser
Instant messaging
Collaboration Database
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Network Administration Applications
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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.11-8
Characteristics of a Network
Speed
Cost
Security
Availability Scalability
Reliability
Topology
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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.11-9
Summary
A network is a connected collection of devices that
cancommunicate with each other. Networks carry data in manykinds of
environments, including homes, small businesses, andlarge
enterprises.
There are four major categories of physical components in
acomputer network: the computer, interconnections, switches,and
routers.
The major resources that are shared in a computer
networkinclude: data and applications, peripherals, storage
devices, andbackup devices.
The most common network user applications include e-mail,web
browser, instant messaging, collaboration, and database.
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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.11-10
Summary (Cont.)
Network administration software allows people responsiblefor
managing networks to see what is happening on thenetwork. The two
primary types of network administrationsoftware are network
monitoring software (such as protocol
analyzers and sniffing software) and network
managementsoftware.
The ways in which networks can be described
includecharacteristics that address network performance
andstructure: speed, cost, security, availability,
scalability,reliability, and topology.
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2005 Cisco Systems, Inc. All rights reserved. INTRO v2.11-11
