Học giao tiếp qua mạng

Identify the role of an intermediary device in a datanetwork and be able to contrast that role with the role ofan end device. Role of an intermediary device provides connectivity and ensures data flows.
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Học giao tiếp qua mạng Communicating over the Network Network Fundamentals – Chapter 2ITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 1 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 schemes in network communications.ITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 2 Network Structure  Define the elements of communication –3 common elements of communication • message source • the channel • message destination  Define a network data or information networks capable of carrying many differentITE PC v4.0 types of communicationsChapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 3 Network Structure  Describe how messages are communicated Data is sent across a network in small “chunks” called segmentsITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 4 Network Structure  Define the components of a network –Network components • hardware • softwareITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 5 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 • both client and serverITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 6 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 • provides connectivity and ensures data flows across networkITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 7 Network Structure  Define network media and criteria for making a network media choice Network media this is the channel over which a message travelsITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 8 Network Types  Define Local Area Networks (LANs) - A network serving a home, building or campus is considered a Local Area Network (LAN)ITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 9 Network Types  Define Wide Area Networks (WANs) - LANs separated by geographic distance are connected by a network known as a Wide Area Network (WAN)ITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 10 Network Types  Define the Internet The internet is defined as a global mesh of interconnected networksITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 11 Network Types  Describe network representationsITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 12 Function of Protocol in Network Communication  The importance of protocols and how they are used to facilitate communication over data networks A protocol is a set of predetermined rulesITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 13 Function of Protocol in Network Communication  Explain network protocols Network protocols are used to allow devices to communicate successfullyITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 14 Function of Protocol in Network Communication  Describe Protocol suites and industry standards A standard is a process or protocol that has been endorsed by the networking industry and ratified by a standards organizationITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 15 Function of Protocol in Network Communication  Define different protocols and how they interactITE PC v4.0Chapter 1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 16 Function of Protocol in Network Communication  Technology independent Protoco ...