思科网络课件计算机网络双语教程第二章.ppt

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1、 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicITE PC v4.0Chapter 11Communicating over the NetworkNetwork Fundamentals Chapter 2ITE PC v4.0Chapter 12 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicObjectivesDescribe the structure of a network,including the devices and media that are

2、 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 impo

3、rtance of addressing and naming schemes in network communications.ITE PC v4.0Chapter 13 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicNetwork StructureDefine the elements of communication3 common elements of communicationmessage sourcethe channelmessage destinationDefine a networkdata or in

4、formation networks capable of carrying many different types of communicationsITE PC v4.0Chapter 14 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicNetwork StructureDescribe how messages are communicatedData is sent across a network in small“chunks”called segmentsITE PC v4.0Chapter 15 2007 Cis

5、co Systems,Inc.All rights reserved.Cisco PublicNetwork StructureDefine the components of a networkNetwork componentshardwaresoftwareITE PC v4.0Chapter 16 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicNetwork StructureEnd Devices and their Role in the NetworkEnd devices form interface with h

6、uman network&communications networkRole of end devices:clientserverboth client and serverITE PC v4.0Chapter 17 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicNetwork StructureIdentify the role of an intermediary device in a data network and be able to contrast that role with the role of an e

7、nd deviceRole of an intermediary deviceprovides connectivity and ensures data flows across networkITE PC v4.0Chapter 18 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicNetwork StructureDefine network media and criteria for making a network media choiceNetwork mediathis is the channel over whi

8、ch a message travelsITE PC v4.0Chapter 19 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicNetwork TypesDefine Local Area Networks(LANs)-A network serving a home,building or campus is considered a Local Area Network(LAN)ITE PC v4.0Chapter 110 2007 Cisco Systems,Inc.All rights reserved.Cisco Pu

9、blicNetwork TypesDefine 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 111 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicNetwork TypesDefine the InternetThe internet is defined as aglobal mesh of

10、interconnected networksITE PC v4.0Chapter 112 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicNetwork TypesDescribe network representationsITE PC v4.0Chapter 113 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicFunction of Protocol in Network CommunicationThe importance of protocols and

11、 how they are used to facilitate communication over data networksA protocol is a set of predetermined rulesITE PC v4.0Chapter 114 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicFunction of Protocol in Network CommunicationExplain network protocolsNetwork protocols are usedto allow devices to

12、 communicate successfullyITE PC v4.0Chapter 115 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicFunction of Protocol in Network CommunicationDescribe Protocol suites and industry standardsA standard is a process or protocol that has been endorsed by the networking industry and ratified by a s

13、tandards organizationITE PC v4.0Chapter 116 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicFunction of Protocol in Network CommunicationDefine different protocols and how they interactITE PC v4.0Chapter 117 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicFunction of Protocol in Networ

14、k CommunicationTechnology independent Protocols-Many diverse types of devices can communicate using the same sets of protocols.This is because protocols specify network functionality,not the underlying technology to support this functionality.ITE PC v4.0Chapter 118 2007 Cisco Systems,Inc.All rights

15、reserved.Cisco PublicLayers with TCP/IP and OSI ModelExplain the benefits of using a layered modelBenefits include assists in protocol design fosters competition changes in one layer do not affect other layers provides a common language ITE PC v4.0Chapter 119 2007 Cisco Systems,Inc.All rights reserv

16、ed.Cisco PublicLayers with TCP/IP and OSI ModelDescribe TCP/IP ModeITE PC v4.0Chapter 120 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicLayers with TCP/IP and OSI ModelDescribe the Communication ProcessITE PC v4.0Chapter 121 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicLayers with

17、 TCP/IP and OSI ModelExplain protocol data units(PDU)and encapsulationITE PC v4.0Chapter 122 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicLayers with TCP/IP and OSI ModelDescribe the process of sending and receiving messagesITE PC v4.0Chapter 123 2007 Cisco Systems,Inc.All rights reserved.

18、Cisco PublicLayers with TCP/IP and OSI ModelExplain protocol and reference modelsA protocol model provides a model that closely matches the structure of a particular protocol suite.A reference model provides a common reference for maintaining consistency within all types of network protocols and ser

19、vices.ITE PC v4.0Chapter 124 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicLayers with TCP/IP and OSI ModelDefine OSIITE PC v4.0Chapter 125 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicLayers with TCP/IP and OSI ModelCompare OSI and TCP/IP modelITE PC v4.0Chapter 126 2007 Cisco Sy

20、stems,Inc.All rights reserved.Cisco PublicAddressing and Naming SchemesExplain how labels in encapsulation headers are used to manage communication in data networks ITE PC v4.0Chapter 127 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicAddressing and Naming SchemesDescribe examples of Etherne

21、t MAC Addresses,IP Addresses,and TCP/UDP Port numbersITE PC v4.0Chapter 128 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicAddressing and Naming SchemesExplain how labels in encapsulation headers are used to manage communication in data networksITE PC v4.0Chapter 129 2007 Cisco Systems,Inc.A

22、ll rights reserved.Cisco PublicAddressing and Naming SchemesDescribe how information in the encapsulation header is used to identify the source and destination processes for data communicationITE PC v4.0Chapter 130 2007 Cisco Systems,Inc.All rights reserved.Cisco PublicSummaryITE PC v4.0Chapter 131 2007 Cisco Systems,Inc.All rights reserved.Cisco Public