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1、Communicating over the Network,Network Fundamentals Chapter 2,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
2、 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.,Network Structure,Define the elements of communication3 common elements of communica
3、tionmessage sourcethe channelmessage destinationDefine a networkdata or information networks capable of carrying many different types of communications,Network Structure,Describe how messages are communicatedData is sent across a network in small“chunks”called segments,Network Structure,Define the c
4、omponents of a networkNetwork componentshardwaresoftware,Network Structure,End Devices and their Role in the NetworkEnd devices form interface with human network&communications networkRole of end devices:clientserverboth client and server,Network Structure,Identify the role of an intermediary device
5、 in a data network and be able to contrast that role with the role of an end deviceRole of an intermediary deviceprovides connectivity and ensures data flows across network,Network Structure,Define network media and criteria for making a network media choiceNetwork mediathis is the channel over whic
6、h a message travels,Network Types,Define Local Area Networks(LANs)-A network serving a home,building or campus is considered a Local Area Network(LAN),Network Types,Define Wide Area Networks(WANs)-LANs separated by geographic distance are connected by a network known as a Wide Area Network(WAN),Netw
7、ork Types,Define the InternetThe internet is defined as aglobal mesh of interconnected networks,Network Types,Describe network representations,Function of Protocol in Network Communication,The importance of protocols and how they are used to facilitate communication over data networksA protocol is a
8、 set of predetermined rules,Function of Protocol in Network Communication,Explain network protocolsNetwork protocols are usedto allow devices to communicate successfully,Function of Protocol in Network Communication,Describe Protocol suites and industry standardsA standard is a process or protocol t
9、hat has been endorsed by the networking industry and ratified by a standards organization,Function of Protocol in Network Communication,Define different protocols and how they interact,Function of Protocol in Network Communication,Technology independent Protocols-Many diverse types of devices can co
10、mmunicate using the same sets of protocols.This is because protocols specify network functionality,not the underlying technology to support this functionality.,Layers with TCP/IP and OSI Model,Explain the benefits of using a layered modelBenefits include assists in protocol design fosters competitio
11、n changes in one layer do not affect other layers provides a common language,Layers with TCP/IP and OSI Model,Describe TCP/IP Mode,Layers with TCP/IP and OSI Model,Describe the Communication Process,Layers with TCP/IP and OSI Model,Explain protocol data units(PDU)and encapsulation,Layers with TCP/IP
12、 and OSI Model,Describe the process of sending and receiving messages,Layers with TCP/IP and OSI Model,Explain 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 maintainin
13、g consistency within all types of network protocols and services.,Layers with TCP/IP and OSI Model,Define OSI,Layers with TCP/IP and OSI Model,Compare OSI and TCP/IP model,Addressing and Naming Schemes,Explain how labels in encapsulation headers are used to manage communication in data networks,Addr
14、essing and Naming Schemes,Describe examples of Ethernet MAC Addresses,IP Addresses,and TCP/UDP Port numbers,Addressing and Naming Schemes,Explain how labels in encapsulation headers are used to manage communication in data networks,Addressing and Naming Schemes,Describe how information in the encapsulation header is used to identify the source and destination processes for data communication,Summary,
