![Objectives ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Ch 7 -](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Chapter7
- 1. Ch 7 - Chapter 7 Data Link Layer
- 13. *Data Link Sub-layers Ch 7 -
- 16. Shared Media Access Ch 7 -
- 26. *Topologies (cont’d) Ch 7 -
- 45. Data Flow Through an Internetwork – 1 Ch 7 -
- 46. Data Flow Through an Internetwork – 2 Ch 7 -
- 47. Data Flow Through an Internetwork – 3 Ch 7 -
- 48. Data Flow Through an Internetwork – 4 Ch 7 -
- 49. Data Flow Through an Internetwork – 5 Ch 7 -
- 50. Data Flow Through an Internetwork – 6 Ch 7 -
- 51. Data Flow Through an Internetwork – 7 Ch 7 -
- 52. Data Flow Through an Internetwork – 8 Ch 7 -
- 53. Data Flow Through an Internetwork – 9 Ch 7 -
- 54. Data Flow Through an Internetwork – 10 Ch 7 -
- 55. Data Flow Through an Internetwork – 11 Ch 7 -
- 56. Data Flow Through an Internetwork – 12 Ch 7 -
- 57. Data Flow Through an Internetwork – 13 Ch 7 -
- 58. Data Flow Through an Internetwork – 14 Ch 7 -
- 59. Data Flow Through an Internetwork – 15 Ch 7 -
- 60. Data Flow Through an Internetwork – 16 Ch 7 -
- 61. Data Flow Through an Internetwork – 17 Ch 7 -
- 62. Data Flow Through an Internetwork – 18 Ch 7 -
- 63. Data Flow Through an Internetwork – 19 Ch 7 -
- 64. Data Flow Through an Internetwork – 20 Ch 7 -
- 65. Data Flow Through an Internetwork – 21 Ch 7 -
- 66. Data Flow Through an Internetwork – 22 Ch 7 -
Notas del editor
- This chapter introduces the general functions of the Data Link layer and the protocols associated with it.
- Media is the physical copper cable, optical fiber, or atmosphere through which the signals travel. A physical network is different from a logical network.
- Two fundamental concepts in networking are the difference between the logical and the physical network.
- At each hop along the path, an intermediary device accepts the frames (encapsulated packet) from a medium, decapsulates the frame, and then forwards the packets in a new frame appropriate to the medium of that segment of the physical network.
- Each frame type has three basic parts: header, data and trailer.
- The Data Link layer is often divided into two sub-layers.
- Data Link layer protocols are generally not defined by Request for Comments (RFCs). Although the Internet Engineering Task Force (IETF) maintains the functional protocols and services for the TCP/IP protocol suite in the upper layers, IETF does not define the functions and operation of that model's Network Access layer.
- The topology of a network is the arrangement or relationship of the network devices and the interconnections between them. Network topologies can be viewed at the physical level and the logical level.
- There are benefits to using a layered model to describe network protocols and operations.
- A physical point-to-point connection.
- A logical point-to-point connection between two nodes may not necessarily be between two physical nodes at each end of a single physical link.
- Each frame type has three basic parts: header, data and trailer.
- The field names above are non-specific fields listed as examples. Different Data Link layer protocols may use different fields from those mentioned.
- IPv6 features
- Technology is determined by the size of the network – in terms of the number of hosts and geographic scope – and the services provided by the network. Difference in bandwidth normally results in the use of different protocols for LANs and WANs.
- The following assumptions are made for this communication. All routing tables are converged ARP tables are complete A TCP session is already established between client and server DNS lookup for the www server is already cached at the client PPP has already established a physical circuit and has established a PPP session
- Consider an internetwork that requires three subnets.
- Consider this example with five LANs and a WAN for a total of 6 networks.