Ccna3 intro wan

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Ccna3 intro wan

  1. 1. By Your Name CCNA 3 Chapter 1 Review: The OSI Reference Model and Routing
  2. 2. Objectives <ul><li>Describe the overall function of the OSI reference model and the problems it solves </li></ul><ul><li>Describe the characteristics of the: </li></ul><ul><ul><li>OSI physical layer </li></ul></ul><ul><ul><li>OSI data link layer </li></ul></ul><ul><ul><li>OSI network layer </li></ul></ul><ul><ul><li>OSI transport layer </li></ul></ul><ul><li>Describe the function of routing in networks </li></ul><ul><li>Understand the different classes of routing protocols </li></ul>
  3. 3. Benefits of the OSI Model?
  4. 4. OSI Layers with Purpose
  5. 5. Peer-to-Peer Communication
  6. 6. Data Encapsulation
  7. 7. Types of Ethernet <ul><li>Ethernet and IEEE 802.3 — LAN specifications, which operate at 10 Mbps over coaxial and twisted-pair cable. </li></ul><ul><li>100-Mbps Ethernet — A single LAN specification, also known as Fast Ethernet, which operates at 100 Mbps over twisted-pair cable. </li></ul><ul><li>1000 Mbps Ethernet — A single LAN specification, also known as Gigabit Ethernet, which operates at 1000 Mbps (1 Gbps) over fiber and twisted-pair cables. </li></ul><ul><li>10 Gigabit Ethernet is only supported over fiber optic media. </li></ul>
  8. 8. Three Varieties of 10 Mbps Ethernet <ul><li>10BASE-2 </li></ul><ul><ul><li>Known as thin Ethernet or thinnet </li></ul></ul><ul><ul><li>Allows network segments up to 185 meters on coaxial cable </li></ul></ul><ul><li>10BASE-5 </li></ul><ul><ul><li>Known as thick Ethernet or thicknet </li></ul></ul><ul><ul><li>Allows network segments up to 500 meters on coaxial cable </li></ul></ul><ul><li>10BASE-T </li></ul><ul><ul><li>Carries Ethernet frames on inexpensive twisted-pair wiring </li></ul></ul>
  9. 9. Encapsulation
  10. 10. The Physical Layer
  11. 11. The Data Link Layer <ul><li>The Ethernet/802.3 Interface </li></ul>
  12. 12. Comparing Models
  13. 13. Address Classes
  14. 14. Address Class Prefixes
  15. 15. Subnetting Chart
  16. 16. Layer 3 Addresses - Path and Host Information
  17. 17. ICMP Testing
  18. 18. How ARP Works
  19. 19. Routing Table
  20. 20. IGP vs . EGP
  21. 21. Path Determination
  22. 22. Network and Host Addressing
  23. 23. Path Selection and Packet Switching
  24. 24. Network Layer Devices in Data Flow
  25. 25. Routing Metrics
  26. 26. Routed Versus Routing Protocol
  27. 27. Path Switching The network layer (3) address does not change. The data link layer (2) MAC address changes for each segment.
  28. 28. Static Versus Dynamic Routes <ul><li>The purpose of a static route </li></ul><ul><li>Why dynamic routing is necessary </li></ul><ul><li>Dynamic routing operations </li></ul><ul><li>How distances on network paths are determined by various metrics </li></ul><ul><li>Classes of routing protocols </li></ul><ul><li>Time for convergence </li></ul>
  29. 29. Static Versus Dynamic Routes
  30. 30. Dynamic Routing Operations
  31. 31. Routing Protocols <ul><li>A routing protocol defines the set of rules used by a router when it communicates with neighboring routers, including the following: </li></ul><ul><ul><li>How to send updates </li></ul></ul><ul><ul><li>What knowledge these updates contain </li></ul></ul><ul><ul><li>When to send this knowledge </li></ul></ul><ul><ul><li>How to locate recipients of the updates </li></ul></ul>
  32. 32. Time to Convergence
  33. 33. Distance Vector Routing Basics <ul><li>Routing updates explained </li></ul><ul><li>The problem of routing loops </li></ul><ul><li>The problem of counting to infinity </li></ul><ul><li>Link-state routing basics </li></ul><ul><li>How link-state protocols exchange routing information </li></ul><ul><li>How topology changes propagate through the network of routers </li></ul>
  34. 34. Distance Vector Routing Basics
  35. 35. Distance Vector Discovery
  36. 36. Distance Vector Topology Changes
  37. 37. Routing Metric Components
  38. 38. Link-State Routing Basics
  39. 39. Counting to Infinity
  40. 40. Split Horizon
  41. 41. Route Poisoning
  42. 42. Link-State Network Discovery
  43. 43. Link-State Topology Changes
  44. 44. Link-State Concerns
  45. 45. Distance Vector Versus Link State
  46. 46. Hybrid Protocols Cisco’s EIGRP
  47. 47. The Transport Layer <ul><li>Segmenting upper-layer applications </li></ul><ul><li>Establishing a connection </li></ul><ul><li>Data transfer </li></ul><ul><li>Reliability with windowing </li></ul><ul><li>Acknowledgment techniques </li></ul>
  48. 48. &quot;Reliable&quot; Transport
  49. 49. Three-Way Handshake
  50. 50. Data Transfer
  51. 51. Windowing – Flow Control
  52. 52. Positive Acknowledgment

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