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Internetworking Overview
- 4. Defining Components of the Network Main Office Branch Office Home Office Mobile Users Internet
- 5. Defining Components of the Network (cont.) Floor 2 Floor 1 Server Farm Branch Office Telecommuter ISDN Remote Campus
- 6. Network Structure Defined by Hierarchy Distribution Layer Core Layer Access Layer
- 10. OSI Model Overview Application (Upper) Layers Session Presentation Application
- 11. OSI Model Overview Data Flow Layers Transport Data-Link Network Physical Application (Upper) Layers Session Presentation Application
- 12. Role of Application Layers Telnet FTP User Interface Examples Application
- 21. Encapsulating Data Transport Data-Link Physical Network Upper-Layer Data Upper-Layer Data TCP Header Data IP Header Data LLC Header 0101110101001000010 Data MAC Header Presentation Application Session Segment Packet Bits Frame PDU FCS FCS
- 22. Upper-Layer Data De-encapsulating Data LLC Hdr + IP + TCP + Upper-Layer Data MAC Header IP + TCP + Upper-Layer Data LLC Header TCP+ Upper-Layer Data IP Header Upper-Layer Data TCP Header 0101110101001000010 Transport Data-Link Physical Network Presentation Application Session
- 23. Application Presentation Session Transport Network Data-Link Physical OSI Model PDU Functional Responsibilities Examples Written Exercise 1: OSI Model
- 25. Physical Layer: Ethernet/802.3 Hub Hosts Host 10Base2—Thin Ethernet 10Base5—Thick Ethernet 10BaseT—Twisted Pair
- 30. Data Destination SAP Source SAP Data Source Address FCS Length Destination Address Variable 1 1 802.2 (SAP) MAC Layer—802.3 Data-Link Layer Functions (cont.) Control 1 or 2 3 2 Preamble Data Destination SAP AA Source SAP AA Variable 1 1 802.2 (SNAP) Control 03 1 or 2 OR OUI ID Type Number of Bytes Number of Bytes
- 35. Network Layer Functions (cont.) 11111111 11111111 00000000 00000000 10101100 00010000 01111010 11001100 Binary Mask Binary Address 172.16.122.204 255.255.0.0 172 16 122 204 255 Address Mask 255 0 0 Network Host
- 38. Using Routers to Provide Remote Access Internet Telecommuter Branch Office Modem or ISDN Terminal Adapter Mobile User Main Office
- 40. Reliable Transport Layer Functions Synchronize Acknowledge, Synchronize Acknowledge Data Transfer (Send Segments) Sender Receiver Connection Established
- 41. Network Device Domains Hub Bridge Switch Router Collision Domains: 1 4 4 4 Broadcast Domains: 1 1 1 4
- 42. Choosing a Cisco Product Distribution Layer Core Layer Access Layer
- 48. Do Not Delete—Overflow Text on Notes Page
- 50. Do Not Delete—Overflow Text on Notes Page
Editor's Notes
- Purpose: This chapter reviews general networking theory and introduces students to a portion of the Cisco product line. Timing: This chapter takes approximately 1.5 hours to present. Note: This section has a product selection tool laboratory exercise at the end. Contents: Objectives—This section explains what the student will be able to do at the end of this chapter. Defining Network Components—This section displays where devices are placed in the network. Mapping Business Needs to a Hierarchical Model—This section describes the hierarchical model used in network design. OSI Model Overview—This section reviews the OSI model. Communicating Between Layers—This section describes encapsulation and de-encapsulation. Written Exercise 1—This section has a written exercise to test the students’ knowledge of the OSI model. Physical Layer Functions—This section describes the physical layer of the OSI model. Data Link Layer Functions—This section describes the data link layer of the OSI model. Network Layer Functions—This section describes the network layer of the OSI model. Transport Layer Functions—This section describes the transport layer of the OSI model.