TCP-IP - Review of Important Networking Concepts...

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1 Review of Important Networking Concepts Introductory material. This module uses the examples to review important networking concepts: protocol architecture, protocol layers, encapsulation, demultiplexing, network abstractions.
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2 Networking Concepts Protocol Architecture Protocol Layers Encapsulation Network Abstractions
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3 neon.tcpip-lab.edu "Neon" 128.143.71.21 argon.tcpip-lab.edu "Argon " 128.143.137.144 router137.tcpip-lab.edu "Router137" 128.143.137.1 router71.tcpip-lab.edu "Router71" 128.143.71.1 Ethernet Network Ethernet Network Router Sending a packet from Argon to Neon
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4 DNS: The IP address of “neon.tcpip-lab.edu is 128.143.71.21 ARP: What is the MAC neon.tcpip-lab.edu "Neon" 128.143.71.21 argon.tcpip-lab.edu "Argon " 128.143.137.144 router137.tcpip-lab.edu "Router137" 128.143.137.1 router71.tcpip-lab.edu "Router71" 128.143.71.1 Ethernet Network Ethernet Network Router Sending a packet from Argon to Neon DNS: What is the IP address of “neon.tcpip-lab.edu ? 128.143.137.1 is 00:e0:f9:23:a8:20 128.143.71.21 is not on my local network. Therefore, I need to send the packet to my default gateway with address 128.143.137.1 frame 128.143.71.21 is on my local network. Therefore, I can send the packet directly. ARP: The MAC address of 128.143.137.21 is 00:20:af:03:98:28 ARP: What is the MAC address of 128.143.71.21? frame
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5 Internet Architecture
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6 Communications Architecture The complexity of the communication task is reduced by using multiple protocol layers : Each protocol is implemented independently Each protocol is responsible for a specific subtask Protocols are grouped in a hierarchy A structured set of protocols is called a communications architecture or protocol suite
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7 TCP/IP Protocol Suite The TCP/IP protocol suite is the protocol architecture of the Internet The TCP/IP suite has four layers: Application, Transport, Network, and Data Link Layer End systems (hosts) implement all four layers. Gateways (Routers) only have the bottom two layers. Application Transport Network Operating system User-level programs Data Link Data Link Media Access Control (MAC) Sublayer in Local Area Networks
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8 Functions of the Layers Data Link Layer: Service: Reliable transfer of frames over a link Media Access Control on a LAN Functions: Framing, media access control, error checking Network Layer: Service: Move packets from source host to destination host Functions: Routing, addressing Transport Layer: Service: Delivery of data between hosts Functions: Connection establishment/termination, error control, flow control Application Layer: Service: Application specific (delivery of email, retrieval of HTML documents, reliable transfer of file) Functions: Application specific
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9 TCP/IP Suite and OSI Reference Model Application Layer Application Layer Presentation Layer Session Layer Transport Layer Network Layer (Data) Link Layer Physical Layer Transport Layer Network Layer OSI Reference Model (Data) Link Layer TCP/IP Suite The TCP/IP protocol stack does not define the lower layers of a complete protocol stack
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10 Assignment of Protocols to Layers Network Layer Routing Protocols PIM OSPF RIP Application
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This note was uploaded on 01/11/2011 for the course EE 5413 taught by Professor Hingcheungso during the Spring '10 term at City University of Hong Kong.

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TCP-IP - Review of Important Networking Concepts...

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