1 Communicating over the NetworkNetwork Fundamentals – Chapter 2

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 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.

3 Network Structure Define the elements of communication3 common elements of communication message source the channel message destination Define a network data or information networks capable of carrying many different types of communications

4 Network Structure Describe how messages are communicatedData is sent across a network in small “chunks” called segments

5 Network Structure Define the components of a networkNetwork components hardware software

6 Network Structure End Devices and their Role in the NetworkEnd devices form interface with human network & communications network Role of end devices: client server both client and server

7 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 network

8 Network Structure Define network media and criteria for making a network media choice Network media this is the channel over which a message travels

9 Network Types Define Local Area Networks (LANs)- A network serving a home, building or campus is considered a Local Area Network (LAN)

10 Network Types Define Wide Area Networks (WANs)- LANs separated by geographic distance are connected by a network known as a Wide Area Network (WAN)

11 Network Types Define the Internet The internet is defined as aglobal mesh of interconnected networks

12 Network Types Describe network representations

13 Function of Protocol in Network CommunicationThe importance of protocols and how they are used to facilitate communication over data networks A protocol is a set of predetermined rules

14 Function of Protocol in Network CommunicationExplain network protocols Network protocols are used to allow devices to communicate successfully

15 Function of Protocol in Network CommunicationDescribe 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 organization

16 Function of Protocol in Network CommunicationDefine different protocols and how they interact

17 Function of Protocol in Network 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.

18 Layers with TCP/IP and OSI ModelExplain the benefits of using a layered model Benefits include assists in protocol design fosters competition changes in one layer do not affect other layers provides a common language

19 Layers with TCP/IP and OSI ModelDescribe TCP/IP Mode

20 Layers with TCP/IP and OSI ModelDescribe the Communication Process

21 Layers with TCP/IP and OSI ModelExplain protocol data units (PDU) and encapsulation

22 Layers with TCP/IP and OSI ModelDescribe the process of sending and receiving messages

23 Layers with TCP/IP and OSI ModelExplain protocol and reference models A 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 services.

24 Layers with TCP/IP and OSI ModelDefine OSI

25 Layers with TCP/IP and OSI ModelCompare OSI and TCP/IP model

26 Addressing and Naming SchemesExplain how labels in encapsulation headers are used to manage communication in data networks

27 Addressing and Naming SchemesDescribe examples of Ethernet MAC Addresses, IP Addresses, and TCP/UDP Port numbers

28 Addressing and Naming SchemesExplain how labels in encapsulation headers are used to manage communication in data networks

29 Addressing and Naming SchemesDescribe how information in the encapsulation header is used to identify the source and destination processes for data communication

30 Summary

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