MODULE - NETWORK MODEL OSI AND TCP/IP MODEL MODEL OF COMMUNICATION Analyzing network in layers What What is is flowing flowing ?? Data Data What What different different forms forms flow flow ?? Text, Text, Graphic, Graphic, Video Video What What rules rules govern govern flow flow ?? Standard, Standard, Protocol Protocol Where Where does does the the flow flow occur occur ?? Cable, Cable, Atmosphere Atmosphere Khoa CNTT – ĐH Nông Lâm TP HCM 2014 3/85 Communication   Transmission of information Examples:        Speaking Smoke signal Body language Morse Telephone Broadcast systems (radio, television) Internet Khoa CNTT – ĐH Nông Lâm TP HCM 2014 4/85 Communication process Packets Protocols Source Address Medium Khoa CNTT – ĐH Nông Lâm TP HCM 2014 Destination Address 5/85 Communication characteristics  Addresses   Media   Who are the source and the destination of a communication process? Where is the communication take place? Protocols  How to make the communication process effectively? Khoa CNTT – ĐH Nông Lâm TP HCM 2014 6/85 conversation  Address   Media   Hello Mr.A, I am B Atmosphere Protocol    Language Speed Handshaking Khoa CNTT – ĐH Nông Lâm TP HCM 2014 7/85 Data Communication  Address   Media   Source address, Destination address Cable, Fiber, Atmosphere Protocol   Format Procedure Khoa CNTT – ĐH Nông Lâm TP HCM 2014 8/85 Protocol  Protocol is a set of rules, or an agreement, that determines the format and transmission of data that make communication on a network more efficient Khoa CNTT – ĐH Nông Lâm TP HCM 2014 9/85 Protocol examples    In transportation In communication In social Khoa CNTT – ĐH Nông Lâm TP HCM 2014 10/85 OSI Review: Layer   Responsibility:  Connection and path selection between two end system across networks Concerned:  Packets  Logical address: Hierarchical  Networks and Hosts addressing  Route , Routing table, Routing protocol  “Network” Khoa CNTT – ĐH Nông Lâm TP HCM 2014 72/85 LAN Device: Router  Makes decisions based on network addresses (logical addresses)  Layer device Khoa CNTT – ĐH Nông Lâm TP HCM 2014 73/85 LAN Device: Router Functions   Path determination:  The process of evaluating a packet’s destination IP address so that the router can decide which port to send out the packet Packet switching:  The router re-encapsulates the packet in the protocol needed for the specified port and then switches the packet out that port Khoa CNTT – ĐH Nông Lâm TP HCM 2014 74/85 LAN Device: Cloud   Another network Include layer – devices Khoa CNTT – ĐH Nông Lâm TP HCM 2014 75/85 Devices function at Layers Khoa CNTT – ĐH Nông Lâm TP HCM 2014 76/85 Teaching Topology Khoa CNTT – ĐH Nông Lâm TP HCM 2014 77/85 DATA FLOW THROUGH LANs Air Mail Example Khoa CNTT – ĐH Nông Lâm TP HCM 2014 79/85 Encapsulation Khoa CNTT – ĐH Nông Lâm TP HCM 2014 80/85 Encapsulation: Example Khoa CNTT – ĐH Nông Lâm TP HCM 2014 81/85 Host to host communication Khoa CNTT – ĐH Nông Lâm TP HCM 2014 82/85 Packet Flow: Layer Device Khoa CNTT – ĐH Nông Lâm TP HCM 2014 83/85 Packet Flow: Layer Device Khoa CNTT – ĐH Nông Lâm TP HCM 2014 84/85 Packet Flow: Layer Device Khoa CNTT – ĐH Nông Lâm TP HCM 2014 85/85 Packet Flow: Layer 1-7 Device Khoa CNTT – ĐH Nông Lâm TP HCM 2014 86/85 ... the Open System Interconnection (OSI) reference model Khoa CNTT – ĐH Nông Lâm TP HCM 2014 13/85 OSI model  The OSI model: a framework within which networking standards can be developed  It provided... department computer networks The Internet, an International Wide Area Network, uses TCP/IP to connect networks across the world Khoa CNTT – ĐH Nông Lâm TP HCM 2014 32/85 layers of the TCP/IP model  Layer... Internet  Layer 1: Network access It is important to note that some of the layers in the TCP/IP model have the same name as layers in the OSI model Do not confuse the layers of the two models Khoa CNTT