TAILIEUCHUNG - Network Fundamentals–Chapter 2

Communicating Over the Network. In this course, we focus on these aspects of the information network: Devices that make up the network, Media that connect the devices, Messages that are carried across the network, Rules and processes that govern network communications, Tools and commands for constructing and maintaining networks. | 111 a 111 a CISCO Communicating Over the Network Network Fundamentals - Chapter 2 ITE I Chapter 6 2006 Cisco Systems Inc. All rights reserved. Cisco Public 1 Objectives In this course we focus on these aspects of the information network - Devices that make up the network - Media that connect the devices - Messages that are carried across the network - Rules and processes that govern network communications - Tools and commands for constructing and maintaining networks This chapter prepares you to - 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 schemes in network communications. ITE 1 Chapter 6 2006 Cisco Systems Inc. All rights reserved. Cisco Public 2 The Elements of Communication Communication begins with a message or information that must be sent from one individual or device to another. All of these methods have three elements in common. -The first of these elements is the message source or sender. Message sources are people or electronic devices that need to send a message to other individuals or devices. -The second element of communication is the destination or receiver of the message. The destination receives the message and interprets it. -A third element called a channel consists of the media that provides the pathway over which the message can travel from source to destination. ITE 1 Chapter 6 2006 Cisco Systems Inc. All rights reserved. Cisco Public

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