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– A reference model provides a common reference for maintaining consistency within all types of network protocols and services.. All rights reserved[r]

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Version 4.0

Communicating over the Network

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Objectives

 Describe the structure of a network, including the

devices and media that are necessary for successful communications

 Explain the function of protocols in network

communications

 Explain the advantages of using a layered model to

describe network functionality

 Describe the role of each layer in two recognized

network models: The TCP/IP model and the OSI model

 Describe the importance of addressing and naming

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Structure

 Define the elements of communication

– common elements of communication

• Message source

• The channel

• Message destination

 Define a network

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Structure

 Describe how messages are communicated

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Structure

 Define the components of a network

– Network components

ã Hardware

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â 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Structure

 End Devices and their Role in the Network

– End devices form interface with human network & communications network

– Role of end devices:

• Client

• Server

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Structure

 Identify the role of an intermediary device in a data

network and be able to contrast that role with the role of an end device

– Role of an intermediary device

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Structure

 Define network media and criteria for making a network

media choice

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Types

 Define Local Area Networks (LANs)

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Types

 Define Wide Area Networks (WANs)

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Types

 Define the Internet

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Network Types

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Function of Protocol in Network Communication

 The importance of protocols and how they are used to

facilitate communication over data networks

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Function of Protocol in Network Communication

 Explain network protocols

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Function of Protocol in Network Communication

 Describe Protocol suites and industry standards

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Function of Protocol in Network Communication

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Function of Protocol in Network Communication

 Technology independent Protocols

– Many diverse types of devices can communicate using the same sets of protocols

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Layers with TCP/IP and OSI Model

 Explain the benefits of using a layered model

– Benefits include

• Assists in protocol design

• Fosters competition

• Changes in one layer not affect other layers

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Layers with TCP/IP and OSI Model

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Layers with TCP/IP and OSI Model

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Layers with TCP/IP and OSI Model

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Layers with TCP/IP and OSI Model

 Describe the process of sending and receiving

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Layers with TCP/IP and OSI Model

 Explain protocol and reference models

– A protocol model provides a model that closely matches the structure of a particular protocol suite

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Layers with TCP/IP and OSI Model

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Layers with TCP/IP and OSI Model

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Addressing and Naming Schemes

 Explain how labels in encapsulation headers are used

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Addressing and Naming Schemes

 Describe examples of Ethernet MAC Addresses, IP

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Addressing and Naming Schemes

 Explain how labels in encapsulation headers are used

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

Addressing and Naming Schemes

 Describe how information in the encapsulation header

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© 2007 Cisco Systems, Inc All rights reserved Cisco Public

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